Engine Wiring Harness for the Porsche® 928


Product Installation Services Available

IDENTIFICATION: The engine wiring harness begins at the inside right-front fender of the Porsche® 928 at a 14-pin connector there, and covers the entire motor and all of its its systems (starter, starter solenoid, alternator, oil pressure sending unit, oil level sending unit, Warm-up regulator, cold-start valve, A/C clutch, auxiliary air valve, and more) except injectors (which have their own harness).

THE PROBLEM: A bad wiring harness can produce low alternator outputs, low readings on the dash gauges and false indicator lights from the Master Control Unit, iffy cold start and warm-up periods, and general reliability headaches. This is caused by engine wiring harnesses with brittle, cracked insulation creating high impedance (resistance) from corroded terminals and wires in the loom.

THE SOLUTION: We manufacture all-new engine wiring harnesses made from the finest materials available that will solve those electrical gremlins in your 928. We used genuine Porsche® harness clips for the cold-start and auxiliary air valve and WUR connections, and a new Porsche® 14-pin connector for the replacement plug-in to the car. The wiring we use is the correct Porsche-colored striped wire, and the connectors are metric OEM flown in from Germany for us.

UPGRADED COMPONENTS: Our wiring harness is better than OEM in three ways:
  1. We have enlarged the output wires from the alternator from 10 mm² to 13 mm² for the 1978-1986 models to both the starter and the forward battery post. This will perform better should you ever install one of our high-output alternators.
  2. All of our connections are not only crimped, but soldered wherever they can be.
  3. The wire loom that we use has a liquid silicone-rubber coating over a fiberglass inner insulative layer. This wire loom has exceptional abrasion, chemical and moisture resistance.

PLUS: we use vulcanizing silicone loom tape a the ends of the loom to seal it against moisture for a long trouble-free life.

NOT SURE WHICH ONE TO ORDER?
Just give us a call. We can help you identify your motor easily so we send the correct wiring harness for your car.

Item Type Part Number Price(USD) Shipping* Availability
16v Engine Wiring Harness for the Porsche® 928 U.S. Only: $20.00
All Others:
Ships in 2 Weeks or Less
32v Engine Wiring Harness for the Porsche® 928 U.S. Only: $20.00
All Others:
Ships in 2 Weeks or Less

* Domestic US shipping shown. International shipping will be calculated based on location.