BlueCuda Posted April 13, 2022 Report Share Posted April 13, 2022 (edited) For those of you that have repaired cruise control issues what did you find was the reason yours quit? Mine hasn't worked since I got the car running, I have checked and verified that the vacuum pump and relay work. The speed sensor seems to work because it will effect idle when the car is moving(if that has anything to do with cruise I don't know). I also get the light on the stalk when the cruise is turned on, but I get zero function. Brake lights function correctly, cruise computer is plugged in. Before I go to the service manual with diagnosis what have you guys found to be the problem? I assume the setup down at the transmission end of the speedometer cable has something to do with cruise. I have a spare one of those to try but have yet to do so. Thanks for any help. Edited April 13, 2022 by BlueCuda 1 Link to comment Share on other sites More sharing options...
tux Posted April 14, 2022 Report Share Posted April 14, 2022 Mine was the vacuum / cable module. I gave up on if. The sheathing was missing in parts and melted in other parts, and the vacuum diaphragm was torn. 1 Link to comment Share on other sites More sharing options...
BlueCuda Posted April 14, 2022 Author Report Share Posted April 14, 2022 18 hours ago, tux said: Mine was the vacuum / cable module. I gave up on if. The sheathing was missing in parts and melted in other parts, and the vacuum diaphragm was torn. I wouldn't be surprised if that was the problem, especially because the one on my parts car is thrashed ha. Link to comment Share on other sites More sharing options...
psu_Crash Posted April 16, 2022 Report Share Posted April 16, 2022 Usually vacuum issues from what I have seen. Mine had a cable with most of the sheath gone, but still worked. 1 Link to comment Share on other sites More sharing options...
Dad Posted April 17, 2022 Report Share Posted April 17, 2022 Most times I see the small plug missing on the brake or clutch pedal for the switch to turn off cruise when pedal is pushed in . it gets brittle and breaks apart, I think we used a plastic body pin like type to hold interior door panels on. Take a look and see if yours is missing. Dad 1 Link to comment Share on other sites More sharing options...
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