Ask a VW Question, Get an Answer ASAP!
Hi, welcome to Just Answers,
If there is no stereo in it now, is there an aftermarket stereo harness connector plugged into the stock stereo harness...these cars are sensitive to stereo work which results in no comunication between the code reader/scanner and the engine computer. if the stereo isn't the issue, we need to know why the check engine lamp doesn't come on, it entails the engine computer isn't getting power.
Check fuses #12, 29, 32, and 34 in the dash fuse box first..I know you mentioned the fuses have been checked, but I need to make sure none were missed...also use a voltmeter or 12 volt test lamp to check the fuses...we need to know if any of them arn't getting power.
And just to make sure, this test was done with the ignition key in the ON position -correct?
So #34 does have power than - correct? Thanks...4,18,19, 20, 21, 22, and 23 are ok to not have power, since they are all lighting fuses...i'm trying to locate where the power source comes from these fuses, but #29 and 32 are crucial for the engine computer to power up...take two wires from the battery positive cable and run them to fuses #29 and 32 - and 34 if it doesn't have power. Just remove the fuse, place the wire in the terminal and place the fuse over it...turn the key on, will the check engine lamp come on?
And what about fuse #34, is it getting power on it's own? With the wires in place crank the engine and see if it runs...
Alright, let me study these wiring schematics, i'm missing something here..but definitly we're not getting power to (3) very imporatnt fuses....so there may be other components not getting power as well. I'll post my findings tommorow morning PST..thanks. Meanwhile check the battery positive cable, be sure all the wires are connected there...and the cables are tight.
Replace this relay in the "E" box, and see if the fuse next to it is good..the relay powers those fuses. You can have an assistant turn the ignition key on and see if the relay makes a clicking sound...
It's really odd to have rust in the ECM, but if there is...the ECM is considered faulty. Is it possible to upload a pic of the ECM and rust? Is there rust in any of the electrical connector terminals or the E box?
Use the toolbar to upload, using the picture of the small tree... has to be under 250k in file size...
did that...not working...i cant even get the link to work now....
How about send it to my email and see if that works [email protected]
i hope those pic turn out i sent them to your email
Ouch, that doesn't look good at all...definitly we're going to have to get a computer for that first. But, can you take your meter and measure for voltage on all the wires of the computer with the key on and tell me which color wires have voltage on them? If the computer shorted internally, it may have taken out a relay or fuse we've overlooked; becuse we still need power on those perticular fuses in the dash fuse box. This explains why even after we added power to the fuses the check engine lamp still didn't come on.
wires that have power are 2 black and white
green and red
Thanks, XXXXX XXXXX until tommorow morning, i'm back at the shop and will have better schematics available...but it sounds like the correct wires are getting voltage, as they should...so we may just be dealing with a bad computer. While I figuer that out, you should get a compression reading of the engine, you mentioned that you were told it's bad, but I don't want us to be dealing with two problems here...