Questionable 4kq Starter Wiring
audi at humanspeakers.com
Sat May 21 21:45:36 EDT 2005
> How much longer do you expect this starter wiring will keep starting the 4kq?
You mean it starts now?
> Have the car on the lift to work on brakes and just checking things out,
> noticed this strange-looking fuzzy green stuff. Does the starter wiring go
> anywhere in the engine compartment where I can conveniently splice in new?
Well, basically, and allowing for corroded memory...
Obviously, the big fat wire goes straight to the battery, and can be
easily replaced with a new one if you like. Although, it looks like all
it needs is a bit of cleaning.
The other two are the trigger from the ignition key circuit (I think
that's the top one in the picture) and the one Audi added to help with
hot start issues (IIRC) that is basically a starter-relayed circuit
sending nice fresh battery voltage to the ECU (pin 24) and thermo-time
switch while cranking.
Since that relay wire is the nastiest looking one, even if it isn't
working, it might not prevent starting.
I wish I could tell you easily where they "come out" so you could
replace them with fresh wires, but I can't recall - if I ever knew.
Here is what I see based on my fusebox diagram, and various manual
browsing. The starter trigger leaves the fusebox at B50A (black
connector under fusebox). This circuit's last place on the fusebox top
is the brass jumper in the A/T lockout position. It also feeds the fuel
pump relay at an unused conact.
The return power feed doesn't go to the fusebox, but on it's way to the
ECU it does visit the cold start valve. The wire is black from the
starter, going to a 6 pin connector, where the other side stays black
and goes to the ECU, while a red/black wire comes back out on the
starter side and heads to the thermo-time switch and continues on to the
cold start valve.
Good luck and I hope this helps somewhat...
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