QuestionI have a 92 GTC comvertable that has a few issues. My power locks work when unlocking on the passanger side, and that's it, you can hear them clicking the relay but it doesn't work. Also my cruise control doesn't work, i've checked to make sure the fuse is there and not blown and we replaced the solinoide to make sure that wasn't the problem. Any help would be nice. Thanks
AnswerP.S. You said you checked the cruise system fuse (#15) but also take a look at #21 which is for the brake lights as it too needs to be patent for the cruise to work, and of course for you brake lights to function. If the brake lights work then #21 is o.k. and it is not the cause for the problem.
Hi Darla,
Both those systems have fairly complex controls that require evaluation by electrical testing/vacuum line tracing. I have the shop manual for '92 which has about 20 pages total on the subject systems. My suggestion is that I xerox copy the pages and U.S. mail them to you so that you will have the procedures to follow. The cost for copying and mailing would be $1.00 and 60 cents. If you would be willing to send me back about that much in stamps (3-37 and 2-23 cent stamps of whatever is convenient) AFTER you have received the pages that would be helpful. Then you can try to diagnose and solve the problem with those materials, and of course you can ask me more along the way.
In the meantime you might want to check for a stored fault code that would impact the cruise system:
The most useful thing to do would be to try to get the fault codes that may stored in the engine controller memory to readout. Try using the ignition key: turn it "on-off-on-off-on" and leave it "on" (doing this quickly, no longer than 5 seconds). By "on" I mean just the normal position when the engine is running, not the cranking position. The 'check engine'light will remain on when you leave the key in the "on" position with the engine still not running. But then watch the 'check engine' light to begin flashing, then pause, flashing, pause, etc. Count the number of flashes before each pause and keep track of the numbers. Repeat the readout and verify the counts are correct. Then group them in pairs in the order that they came out, thus forming two digit numbers. You may notice that the pause is shorter between the digits of a given number, and longer between the numbers themselves. Then send me a 'follow-up' question telling me the results of your readout. By the way, 55 will be the last number (two groups of 5 flashes each) and that is the code for "end of readout".
Either a code 15 or 34 would be relevant to the cruise control.
So write back with your postal address and tell me if you got any codes, and we'll take it from there.
Roland
