hi , i am looking for wiring colour code for 04 touareg .wvgzzz7lz5d026315. uk car
this to wire up towbar electrics so just the rear light/indicators would do
is it better to pick up the wires at j345 (trailer detection control- if i have it)
If you try to wire a trailer harness directly into the wiring, it will throw a fault and turn off those lights, as it will see too high of a voltage draw at that circuit and assume it is high resistance (ie, a nearly burned out bulb)
The Touareg has a trailer module available, but it does not come installed stock- it is installed with the trailer hitch, and has to be programmed into the diagnostic control module to be recognized.
I can get you the wiring colors if you're still interested after that- I would just need your VIN
In addition- the brake lights are the same as the tail light bulbs- they are just intensified in brightness to show that braking is enabled- so no way to differentiate two different circuits there. It is all done by pulse width modulation (duty cycle) rather than voltage.
the following day i was at vw dealer to pick up other parts .
they provided the colour codes - not too helpful regards XXXXX XXXXX general but i used a bypass relay and all is now sorted.