914/4
Porsche Replacement Wiring Harnesses
Jeff Bowlsby San Ramon, California
Please contact me to tell me what items you want and your zip code,
and I will respond with a full quote including shipping cost and payment details.
Our harnesses are in customers classic vintage
Porsche's, VW's and other German cars throughout the world.
Australia, Austria, Belgium, Brazil, Canada, England, France,
Germany, Italy, Japan, Kenya, Mexico, New Zealand, Norway,
Portugal, Scotland, South Africa, Spain, Sweden, Switzerland, USA and more.
A sincere Thank You to our customers!
OVER 1,200
Porsche 914/912E, Mercedes Benz, BMW E9 and VW TIII/TIV,
D-Jet and L-Jet wiring harnesses and MPSs, built or repaired, since
2001
--- This website last updated in January 2024 ---
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. All other trademarks are property of their respective owners.
Quicklinks
Examples of wiring harnesses we build
Some specialized equipment and tooling we use
914/4 Porsche NOS Wiring Harness Gallery
914/4 Porsche Wiring Harness Diagrams Reference Library
Availability and Pricing Chart
Does your existing wiring harness look like this rats nest?
Broken casing, deteriorated or missing boots, spliced or cut off branches, melted, brittle or broken wires causing internal shorts?
You can be certain that the original wire terminals are definitely dirty, corroded and worn out.
All of these conditions adversely affect the electrical connectivity of a wiring harness.
No Connectivity, No Joy
Replacement Porsche 914 Wiring Harnesses
The engine bay wiring harnesses in our Porsche 914 cars are vitally important components and are exposed to severe degradation and contamination from heat, vibration, rain, oil and just ordinary handling. The original wiring in our 914s is four decades old and new OEM wiring harnesses are not available anymore. The unique original parts for harness repairs are nearly impossible to find you will not find them at your neighborhood hardware store or even at the best German car parts stores. Used original wiring harnesses can be found, but these original wiring harnesses, are also likely to be at the end of their service life. Heat degradation and fluid contamination cause the harness casing, protective rubber boots and wire insulation to harden, crack and break off, eventually causing internal wiring harness shorts. Vibration contributes to wire breakage at wire terminals and intermittent contact. Dirt and corrosion at the wire terminal connections inhibit electrical conductivity. ~40 years of disconnecting and reconnecting the connectors from the engine simply wears the wiring harnesses and their connections out and causes them to fail. With any of these conditions you could be sitting by the side of the road instead of canyon carving. Installing carbs is not your only option, and may not be the best solution either.
We rebuild repair and restore the critical engine bay wiring harnesses for the Porsche 914. We make replacement wiring harnesses for the harnesses that see the most abuse and deterioration because we want to do our part to keep these great cars on the road for many years to come. Not surprisingly, many customers have conveyed to us how these replacement harnesses have cured long term, previously undiagnosed problems such as intermittent stumbling, a bouncy tach, a faulty idle, lean/rich conditions, or that replacing or repairing a harness was the actual solution to what was thought to be a faulty fuel injector, bad pressure sensor, defective coil or an electrical system charging problem.
Let us explain what we mean by rebuilt. We could easily call these harnesses new and mostly they are, except that certain original hard plastic housings and other miscellaneous parts which are no longer available new, and only where those items are perfectly serviceable, are reused. Everything that can be replaced is new. New correctly color-coded wire, new wire harness casing, new wire terminals, new rubber boots you get the idea. Our list of satisfied 914-owner customers is extensive, and these harnesses have helped keep the factory fuel injection on many 914 cars.
The research and development required to make these harnesses to the high quality that they are is extensive, including rigorous in-service testing. They may appear easy to make but do not be fooled into thinking you could do your own in a few hours, they are much more difficult than they appear. Over four years in development and testing, each FI harness takes most of a day to fabricate, even with all the correct parts, special tooling and experience on hand. You receive the benefit of all of these things at the lowest price possible and with quick delivery. Our replacement harnesses are configured identically to the original OEM factory wiring harnesses and are handcrafted to exacting standards using new, OEM or better quality components, without being overbuilt. New high-count multi-strand copper wiring with correct color coding and upsized wire gages is used with new OEM wire terminals and durable new harness casing. Original, serviceable, hard plastic parts are cleaned and reused because they are not generally available new. Our wiring harnesses feature extra-durable, new rubber boots (the finest-quality available), and casing reinforcements at critical wire terminals and internally to the harness, for long-lasting durability. Great care is taken in the workmanship of every harness, and each harness is comprehensively bench-tested during fabrication and again at completion. Each harness includes an electrical circuit diagnosis and installation diagram to make the installation of each harness a simple task.
Unsolicited responses from customers we have received since 2001:
*I received the harnesses today. Absolutely incredible craftsmanship.� I really appreciate it. Thanks for the diagrams as well.
I do some network cabling myself, so I really appreciate clean, professional work.� Craig K, Georgia
Have to say the harnesses look mighty fine great job and thanks for keeping the 914 alive!!� Greg G, Massachusetts
OMG!! We received the harnesses and are extremely pleased with the engineering quality and diligence!!
Jeff, you are an artist and skilled practitioner! Thank you for the time and effort! Darren C, Washington
Jeff, I had to send you an email. The harness that you built is of the finest quality and craftsmanship. I took it out of the package and I could not stop staring at it. Excellent in all aspects. Installing tonight!� Steve T, Ohio
Just installed the MPS. YOU DID IT! It's FIXED!. Fired right up. idles great. revs quick. No flat spot
and no bucking it is definitely a 100% improvement. Thanks again for your great service Gary C, California
Top Shelf work and well worth the money� Steve C, Missouri
Beautiful work. The included literature is both clear and useful Jim Thorusen, California
Jeff, I just wanted to drop you a note to say the harness you build for the 1973 1.7 that I am restoring is by far the best piece of
craftsmanship that I have seen in some time. Although I think your harness far exceeds the factories version, what I especially liked are the dust boots. The fit is tight, snug and creates a very good seal. Thanks again - Hayward S, Washington
It looks like it should be on the Space Shuttle Steve S, California
Jeff, You are a lifesaver! I had struggled with fuel injection issues for a year and I was at my wits end about what I could do to rectify those issues.
Once I installed the new FI harness all those problems went away and my 1.7L is back to being a car I love!
You provide a hugely valuable service for us that no one else I know of does. Thank you for that! - Greg R, Colorado
The build quality is excellent, the components are superior, the appearance is great Brad Anders, Arizona
Better than OEM Factory, solved all of my problems Bob H, California
You Rock..You Rock..You Rock..!!! Rex L, Colorado
I have received the harnesses, thank you so very much for building it and assisting with the shipping. The quality and the workmanship of the harnesses are flawless! I feel like wrapping it in clear plastic just to keep it looking that good! Christopher G, South Africa
Aloha Jeff, I've gotta tell you, those aren't harnesses you sent, they're works of art. By far, these are
the most beautifully-prepared and restored harnesses I've ever seen. I wish I could have received the same quality of workmanship for the harnesses I've installed in other vehicle restorations. I can't wait to get these installed, and have the car back on the road. Many mahalo - Scott M, Hawaii
I received the MPS yesterday and have to tell you: My car has never ran nicer!
It started right up, no stalling, and went on a small Christmas Eve road trip. I'm really psyched.
Great job and thanks again! - Ron W, New Jersey
THANK YOU!
To our previous customers who have continued to inspire us in making these harnesses available for D-Jet and L-Jet car owners
Examples of the Wiring Harnesses We Build
See Availability and Pricing Chart Below
914/4 Porsche D-Jet Fuel Injection Harnesses
ECU to engine sensors, fuel injectors and relay board ��� Replacement boots
914/4 Porsche D-Jet Fuel Injection Harnesses
ECU to engine sensors, fuel injectors and relay board ��� Original D-Jet boots
914/4 Porsche L-Jet Fuel Injection Harnesses
ECU to engine sensors, fuel injectors and dual relay
914/4 Porsche Ignition Harnesses
Relay board to starter motor, back-up light switch, coil, oil pressure sender, aux air regulator���
For D-Jet and L-Jet cars
021.971.349D 914/4 Porsche Alternator Harness
Relay board to alternator, starter motor
Rebuilt Manifold Pressure Sensor (MPS)
For Porsche 914 1.7L and 2.0L D-Jet fuel injection
914.612.115.10 Rear Foglight Harness
For all Porsche 914 with foglights
914.612.143.10 914/4 Porsche Windshield Wiper Delay Harness
For 1972-76 914 Porsche only. Mounts to the front cowl support strut and
attaches to the brown/black stripe wire in the chassis harness under the cowl.
Replacement rubber boots comparison to Original D-Jet FI harness boots
(Extremely limited supply of Original boots - inquire about availability)
914.612.145.10 1973-76 Porsche 914 Oil Temperature Gauge sender cable
Throttle Position Sensor calibration plugs.
Verify the # of cavities on your TPS before ordering (4 or 5 cavity plug?)
We Build and Restore Other D-Jet and L-Jet Wiring Harnesses (Only by Special Order and Quote)
Fuel Injection and other engine bay harnesses for the Porsche 912E, VW, Volvo, Mercedes Benz, Peugeot, Renault, Cadillac
Wiring Harness Repairs and Restoration (By Quote)
At the present time there are a few wiring harnesses for 914's and other mostly German D-Jet/L-Jet cars that we may not rebuild,
but your wiring harness may be repairable. Whether your existing wiring harness needs significant repair (such as from an engine fire)
or only minor attention, please send your harness to us and request a free repair quote. Our service will put you back on the road. Email Me
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914/4 Porsche Master Wiring Harness Availability and Pricing Chart
All USA-market wiring harnesses originally produced are listed for reference. Pricing is only indicated for the harnesses we build.
|
Engine Bay Harnesses |
PN |
Year |
Comments (Note 1 below) |
Price |
Refundable Core Charge (Note 2 below) |
|
Alternator Harness |
1970-76 |
Includes the two large rubber engine tin grommets and battery+ terminal boot. High Temp Terminals of the highest quality! Reinstall your existing hard plastic connector housings. |
$102 |
Core Harness Not Required |
|
|
Fuel Injection Harness 1.7L |
1970-72 |
W-code engine. Reinstall your existing ECU connector handle |
$612 |
$50 |
|
|
1972-73 |
EA/EB-code engine. Reinstall your existing ECU connector handle |
||||
|
Fuel Injection Harness 1.8L |
1974-only |
EC-code engine, 6-pole AFM |
$991 |
||
|
1975-only |
EC-code engine, 7-pole AFM |
||||
|
Fuel Injection Harness 2.0L |
1973-74 |
GA-code engine. Reinstall your existing ECU connector handle |
$675 |
||
|
1975-76 |
GC-code engine, with Speed Limiter branch (CA-only). Reinstall your existing ECU connector handle |
$649 |
|||
|
1975-76 |
GC-code engine, w/o Speed Limiter branch (49-state). Reinstall your existing ECU connector handle |
$612 |
|||
|
Ignition Harness 1.7L |
1970-71 |
W-code engine. Includes reverse light switch boot. |
$345 |
||
|
1972-only |
W-code engine. Includes reverse light switch boot. |
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|
1973 |
EA/EB-code engines. Includes reverse light switch boot. |
||||
|
Ignition Harness 2.0L |
1974-76 |
GA/GC/GCSL-code engines. Includes reverse light switch boot. |
|||
|
Ignition Harness 1.8L |
1974-75-only |
EC-code engine |
$455 |
||
|
Oil Temp Gauge Sender Cable 1 |
1970-71 |
Cable from sender to Ignition Harness. Reinstall your existing mounting hardware. |
$34 |
Core Harness Not Required |
|
|
Oil Temp Gauge Sender Cable 2 |
1973-76 |
Cable from sender to chassis harness near battery. Reinstall your existing mounting hardware. |
$34 |
||
|
Oil Temp Gauge Sender Cable 3 |
914.612.155.10 |
1973-76 |
Cable from center console to dash combo gauge, w/o center console gauges |
$26 |
|
|
Battery-Starter Cable |
914.611.031.00 |
1970-76 |
Cable from battery+ to starter motor |
||
|
(Chassis Harnesses) |
PN |
Year |
Notes |
Price |
Refundable Core Charge |
|
1970 |
Main Cables |
Not Available |
|||
|
1971 |
Main Cables (to VIN 4722900008) |
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|
1972 |
Main Cables (from VIN 4722900009-4722908250) |
||||
|
1972 |
Main Cables (from VIN 4722908251) |
||||
|
1973 |
Main Cables |
||||
|
1974 |
Main Cables |
||||
|
1975-76 |
Main Cables, 49-state |
||||
|
1975-76 |
Main Cables, CA-only (Includes CAT/EGR emissions circuits) |
||||
|
PN |
Year |
Notes (Note 1 below) |
Price |
Refundable Core Charge |
|
|
Combined Relay/Diode |
914.612.067.10 |
1975-76 |
Diode with cable for combined relay (from support to fuse box) |
||
|
High Beam Headlight relay |
914.612.052.10 |
1973 2.0L |
Switch High Beam Headlight |
||
|
Fog Lights |
914.612.057.10 |
1974-76 |
Wiring harness switch for fog tail lamp and rear foglight |
||
|
914.612.057.13 |
1972- |
||||
|
1974-76 |
Additional cables for rear foglight |
$281 |
|||
|
914.612.115.13 |
1972-73 |
||||
|
Double Horn |
914.612.065.10 |
1972-74 |
Additional cables for double horn |
||
|
914.612.177.00 |
1975-76 |
$68 |
|||
|
Wiper Delay |
1972-76 |
Additional cables for interval relay windscreen wiper system |
$102 |
||
|
Lights/Gauges |
914.612.041.20 |
1970-73 |
Wiring harness for lights and instruments |
||
|
914.612.043.01 |
1973 |
Positive cable instrument cluster, 2.0L-only |
|||
|
CAT relay/EGR counter |
914.612.109.20 |
1975-76 |
Catalytic converter relay harness, CA-only |
$102 |
|
|
Radio |
914.612.053.10 |
1974-76 |
Wiring harness for radio, Blaupunkt (No. 21) |
||
|
914.612.054.10 |
Wiring harness for radio, Blaupunkt (GT40) |
||||
|
914.612.055.10 |
1974-76 |
Cables for radio loudspeaker, Blaupunkt |
|||
|
914.612.060.10 |
Cables for radio loudspeaker, Becker |
||||
|
914.612.121.10 |
Wiring harness for radio, Becker |
||||
|
Center Console |
914.612.151.10 |
1973-76 |
Wiring harness for center console |
||
|
Emergency Brake |
914.612.132.12 |
1970-73 |
Wiring harness for emergency light switch brake, 2-pole |
||
|
914.612.049.16 |
1974-76 |
Additional cables for emergency light switch brake, 1-pole |
|||
|
Rear Window Defroster |
1975-76 |
Additional cables for rear window heating |
|||
|
1972-74 |
|||||
|
1974 |
|||||
|
Rear License Plate Lights |
914.612.085.00 |
1975-76 only |
Wiring harness for license plate lights |
$81 |
|
|
Fuel Pump Ground Cable |
914.612.161.20 |
1975-76 only |
Ground cable for fuel pump |
||
|
Steering Column Cable |
914.613.911.10 |
1970-71 |
Horn ground wire |
$12 |
|
|
PN |
Year |
Comments |
Price |
Refundable Core Charge (Note 2 below) |
|
|
D-Jet FI harness ECU handle |
022.906.209 |
1970-76 |
Inquire for availability. |
Free w/ FI harness purchase |
|
|
Full set |
1970-76 |
Not available separately, only with D-Jet FI harness purchase. Inquire for availability. |
$114/harness |
||
|
Alternator harness connectors |
1970-76 |
Not available separately, only with alternator harness purchase. Inquire for availability. |
$8/each |
||
|
TPS calibration plug 4-pole |
1970-76 |
$23 |
|||
|
TPS calibration plug 5-pole |
1970-76 |
$46 |
|||
|
Rebuilt MPS Manifold Pressure Sensor for stock 1.7L and 2.0L D-Jet 914 engines. Sorry, I do not offer MPS calibrations for custom engine configurations including the 2056 engines. A custom calibrated MPS requires custom tuning on a dyno or exhaust gas analyzer by a qualified technician, to meet the requirements of a custom engine. Cleaned, rebuilt with a new diaphragm and gaskets, calibrated and bench tested. |
0.280.100.037 |
1973 2.0L |
You will need to send me your MPS to rebuild and calibrate, I do not inventory cores. MPS calibration notes: Rebuilt MPS are calibrated to the known values of NOS MPSs. These values are verified to be generally accurate for the specified engines, but may not be precisely correct for your engine, because your engine may not be in the same state of tune, wear or condition as a factory new reference engine used to determine the NOS MPS calibration values. Consider that the MPS calibration provided is as close as possible, but for optimum performance your engine/fuel injection system should be evaluated on a dyno or exhaust gas analyzer and adjusted accordingly by a qualified technician. So that the MPS can be accessed easily for adjustment, the outer MPS stop receives only a drop of clear nail polish to hold it in place and not a full epoxy seal. I do not offer MPS calibration-only services for MPSs that I have not also rebuilt. |
Cleaned and rebuilt: $493. |
|
|
0.280.100.043 |
1974-76 2.0L |
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|
0.280.100.049 |
1970-73 1.7L |
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|
Mercedes Benz (D-Jet) |
1972 450SL |
There are many variations of these MB harnesses and we do not have templates for all of them yet. We will need your harness for reference to be sure you receive the correct harness. We have most of the parts in inventory but there are a few hard plastic parts that are NLA so we will need to use your rebuildable core harness. New OEM rubber firewall boot available at additional cost. Reinstall your existing ECU connector handle. (Note 1 below) |
$1,320. |
Core Harness Required |
|
|
1973 450SL |
|||||
|
1973 450SLC.1 |
|||||
|
1973 450SLC.2 |
|||||
|
1974/75 450SL |
|||||
|
Porsche 912E (L-Jet) |
1976-only |
(Note 1 below) |
$1,005 |
Core Harness Required |
|
|
Ignition/Alternator/Starter Harness |
We will need to rebuild your harness and reuse some of its unique rare NLA parts |
$704. |
|||
|
VW Type III (D-Jet) Fastback, Squareback, Notchback |
1968, Manual Transaxle, without CSV system |
There are many variations of these harnesses and we do not have templates for all of them yet. We will need your harness for reference to be sure you get the correct harness. Reinstall your existing ECU connector handle. (Note 1 below) |
$652 |
$50 |
|
|
1969, Manual Transaxle, with CSV system |
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|
1968-69, Auto Transaxle |
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|
1971-72 |
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|
1973 |
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|
VW Type IV 2-door or 4 door Coupe, 2 door Wagon |
1969-72 411, D-Jet |
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|
1973 412, D-Jet |
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|
1974 412, D-Jet |
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|
1974 412, D-Jet 2Dr Coupe, Manual Transaxle |
|||||
|
1974 412, L-Jet, 2Dr Wagon, Auto Transaxle |
$1,140 |
$50 |
|||
|
1971-74 |
Reinstall your existing 3-cavity housings and firewall grommet |
$162 |
Core Harness Not Required |
||
|
VW Beetle, Super Beetle, Bus (L-Jet) |
1975-79 |
Fuel Injection Harness |
We will need your harness for reference |
Free quote |
$50 |
|
1975-76 Bus 1.8L |
Fuel Injection Harness |
We will need your harness for reference |
|||
|
Volvo, Peugeot, Renault, Cadillac Fuel Injection harness (D-Jet and L-Jet) |
We will need your harness for reference |
Free quote |
$50 |
||
|
Wiring Harness Repairs and Restoration |
There are a few wiring harnesses for 914's and other D-Jet/L-Jet cars that we may not rebuild, but your wiring harness may be economically viable to repair if the wires and outer casing are not brittle, cracked or broken. Whether your existing wiring harness needs significant repair (such as from an engine fire) or only minor attention, please send your harness to us and request a free evaluation and repair quote. If the harness is economically viable to repair, our service will put you back on the road. |
Free quote. We will need to inspect the harness to offer the repair quote. |
Note 1: Item includes printed diagram to assist with installation ad future troubleshooting. Diagrams also available for download from Reference Library below. Slight color variations in outer casing one section to the next may occur just like the original OEM harnesses it adds character and a sense of originality. Rubber grommets for chassis or engine tin harness penetrations not included unless indicated. Reinstall your existing grommets.
Note 2: Core charge required where indicated. Applicable core charge is refundable to purchaser subject to our receipt, inspection and acceptance of your submitted core. One core refund per like item purchased.
MOST items are inventoried and available for prompt shipment
Money Back Guarantee and Limited Warranty
30-day money back guarantee, because we want you to be happy with your purchase.
90-day limited warranty against workmanship or material defects.
Shipping & Payment
We ship at reimbursed cost (no mark-up!) using USPS Priority Mail to all USA and Worldwide addresses.
U.S. funds only, credit cards only through PayPal, money orders, checks.
Contact me directly with any questions you may have or to place an order
Jeff Bowlsby
San Ramon, California
Please contact me to tell me what items you want and your zip code, and I will respond with a full quote including shipping cost and payment details.
!!! See My Other 914 Porsche Websites !!!
________________________________________________________________________________
Some of the Specialized Tooling & Equipment We Use
An inductance meter, fuel injection testers, hand tools and a break out box, these tools are indispensable for our work.
________________________________________________________________________________
914/4 Porsche NOS Wiring Harness Gallery
They are Art because you do not see these very often.
039.971.671 1973-74 2.0L GA engine code Fuel Injection Harness
039.971.761B 1975-76 2.0L GC engine code Fuel Injection Harness (49-state)
022.971.761Q 1975 1.8L EC engine code Fuel Injection Harness
311.971.761 VW Type 3 Fuel Injection Harness
914.612.007.13 1972-only 1.7L Ignition Harness
914.612.007.15 1973-76 1.7L, 2.0L Ignition Harness
914.612.016.16 1974 1.8L Ignition Harness
914.612.132.12 1970-73 Wiring harness for emergency light switch brake (2-pole)
914.612.049.16 1974-76 Additional Cables for Emergency Light Switch Brake (1-pole)
914.612.052.10 1973 2.0L Switch High Beam Headlight
914.612.053.10 1974-76 Wiring harness for radio, Blaupunkt (No. 21)
914.612.054.10 Wiring harness for radio, Blaupunkt (GT40)
914.612.056.10 1975-76 Additional cables for rear window heating
914.612.121.10 Wiring harness for radio, Becker
914.612.155.10 1973-76 Cable from center console to dash combo gauge, w/o center console
914.613.911.10 1970-71 Horn ground wire
915.612.057.10 1974-76 Wiring harness switch for fog tail lamp and rear foglight
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914/4 Porsche Original Wiring Harness Gallery
Original wiring harnesses for visual identification reference
914.612.151.10 1973-76 Center console gauge harness
914.612.143.10 1972-76 Wiper delay relay harness
914.612.085.00 1975-76 Rear License Plate Lights harness
914.606.101.00 1973-only Temp Sensor 2 ballast resistor ��� 270 ohms
039.905.351 1975-76 2.0L Solid State Speed Limiter Circuit
This circuit plugs into the FI harness of a 1975-76 2.0L California-only model 914s near the battery
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914/4 Porsche 914/4 Wiring Harness Diagrams - Reference Library
for troubleshooting your own harnesses
914/4 Porsche Wiring Harness ID Guide - DRAFT
914 Porsche
D-Jet Fuel Injection Harnesses
1970 Porsche 914 1.7L W code engine
1971-72 Porsche 914 1.7L W code engine
1972-73 Porsche 914 1.7L EA/EB code engine
1973-74 Porsche 914 2.0L GA code engine
1975-76 Porsche 914 2.0L GC code engine (without speed limiter)
1975-76 Porsche 914 2.0L GC code engine/SL (with speed limiter)
1968 Volkswagen Type 3 without CSV
1968-69 Volkswagen Type 3 - Manual Transaxle
1968-69 Volkswagen Type 3 - Auto Transaxle
1969 Volkswagen Type 3 with CSV.1
1969 Volkswagen Type 3 with CSV.2
1971-74 Volkswagen 411 412 Alternator Harness
1974 Volkswagen 412 2-Dr Coupe Manual Transaxle
1974 Volkswagen 412 2-Dr Wagon Auto Transaxle
D-Jet Ignition Harnesses
L-Jet Fuel Injection Harnesses
L-Jet Ignition Harness
Porsche 914/4