A4 No doors interior lights or alarm

[diode]

One other thing but it may be the problem I fitted a newer Audi CD player from the casette version I posted this below just for anybody else that may read the thread

Will try and report back

The "Aftermarket Radio Problem"

The Problem

Nothing in the car cares if the K-line is shorted to +12. The K-Line is not used for intra-vehicle communications. But a scan-tool initializes a communications session by pulling the K-line to ground. The K-line is supposed to have some voltage on it, but through a high-impedance source. If the K-line has "hard" +12 on it, something has to give! What "gives" is usually the scan-tool's output driver for the K-line. And fixing a VAG-1551/1552 with a blown K-line driver is expen$ive! But the ISO-COM PC<->Car interface adapter that we provide with our VAG-COM software has a small user-replaceable fuse protecting the K-Line output driver, and there's a spare fuse taped under the lid of the little box. No big worries there..:-) Our other interfaces use output drivers that are thermally protected against shorts. They don't need a fuse. If you plug them into a car with the K-line shorted to +12, they simply won't work in that car, but it won't hurt them either.

[diode]

Still no where with this
Can somebody tell me the ECU that controlls Alarm functions Electric Windows Interior lights is the one located in the passenger footwell

Also if somebody could recommend a parts supplier not prominent in Google or a decent fluid to ignite the beast and a forum where you can get help with problems like this

Thanks

[jak]

It is the one in passenger footwell. i've read alot of threads where it is a break in the wiring to or from the module