What is the Correct Wiring Harness for a 2006 VW Jetta

Expert Reply:

For your 2006 VW Jetta, you will actually need Tow Ready Wiring, # 119176KIT. This kit is for the 4 door sedan model. The kit comes with everything you will need to install it on your vehicle.

Your 2006 VW Jetta has a multiplex wiring system. To wire your vehicle you will need to take the following steps:
Note: You may need to test the wires using a Circuit Tester like # 3808.
1) Start by opening the trunk to locate the carpeted access covers to the tail light plugs on each side.
2) Locate the black 4-way housing to access the vehicle functions.
3) Starting on the Drivers side and using a circuit tester, locate the wire (typically Black with Yellow stripe) that has multiple functions (Tail, Brake, Turn). Connect the Yellow (Left Turn) wire on the harness to this wire. Using a volt meter, you will find 12 volts for the Turn and Brake functions and 2 volts for the Tail Light function.
4) With circuit tester, locate the tail light circuit. There are multiple tail light function wires. Use the wire with 12 volts (typically Gray with Black stripe on Drivers side). Connect the Brown wire (Tail Light) on the harness to this wire.
5) Route the Green wire to the Passengers side. Locate the multiple function wire (typically Black with Green stripe). Connect the Green (Right Turn) wire on the harness to this wire.
6) Ground the White and Red wires on the harness.
7) Route the Black battery wire per installation instructions.
8) Test with a circuit tester before connecting to a trailer.

expert reply by: Michael H