Derekm803

Hey, all.
Just signed up to this forum to get help troubleshooting issues w/ my fiaces' ride. Imma give the whole back story just in case. Okay. First, it is a 2004 TT Convertible. 1.8 turbo/auto.
The fuel gauge wastnt working, read half a tank all the time so i put in a new sending unit combo in. That didnt help. After that i pulled the factory radio out. Handed it back off to her since it was running. She came back home and said windows wouldnt roll up when she left the store. Come to find out it is the windows, pdl, trunk latch, conv top button, power back draft window and maybe more. It still cranks, runs n drives just none of that stuff works. Where are all the possible causes of the lost powers located and how do i check each one?
Thanks in advance.

Mister Bally

Fusible links in the compartment above the battery. Check with volt/ohm meter.
You really need a service manual for the car. Also the Ross-Tech diagnostic interface.

Derekm803

I agree. The only service manuals ive seen so far are $80-$200. Any good outlets on those and the diagnostic?

Mister Bally

Buy the genuine stuff to work on the car or pay someone with it to repair it for you. It's the price of admission.....

Derekm803

All the fuseable links n fuses on top of the battery are good. Where to next?

bailee

Your Comfort control module (CCM) is suspect. Dealer cost is $645 + install-program. If the key fobs are bad add $200 ea. Or you can DIY if you purchase a Ross-Tech unit to code with. This unit is essential to this cars health. There is another unit on the market but I've not tried it. CCM's are available on eBay but buyer beware as many are pulled from wrecked or salvaged cars which may have had the unit water soaked. Most sellers won't accept electrical returns. This is a top ten issue with this particular model.

Derekm803

Ive been reading some threads about CCMs. There any way to test it?

Mister Bally

install replacement module and have it programmed by a dealer if necessary. If systems that didn't work now do, the module is good.
That said, you need to run a diagnostic scan with the VAG scanner or Ross Tech software & interface. Anything else and you're wasting your time.

bailee

There are companies out there that test them. Once tested you'll still need to clear codes with the Roos-Tech. No easy way out. Sorry I don't know of any particular companies I spent my money on the RT.

Derekm803

Is the vag com or the rosstech going to say "ccm bad" or spmething like that?