Cruise Control Prolem
03-16-2010, 06:57 PM
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Cruise Control Prolem
My cruise control in my 91 100 is not working at all, i tried looking to see if it was a fuse but the fuse is fine, and in the manual, it says there is a #30 slot for the cruise fuse, but don't see one in the panal. What else could be wrong?
03-17-2010, 11:24 PM
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Did you eliminate the switch as the culprit? I put some contact cleaner on mine and that fixed it. There is a ton of info on this if you search. Also you might get some better responses at quattro w o r l d.
03-18-2010, 08:42 AM
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03-24-2010, 06:11 PM
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11-07-2010, 04:48 PM
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Vacuum vent valve
So I have gone through most of the diagnostics for fixing the cruise control. I re-soldered the capacitors on the module board (looked cracked), tested the 6 pins on the stalk, the vacuum diaphragm connected to the throttle linkage, the vacuum switches on the brake and clutch.... that's most of it so far. Now I am testing the pump itself and hooked it up to a vacuum gauge with the power terminal to 12V, and the other two terminals to ground. I can get the pump to operate, but it wont hold the vacuum pressure when the power is switched off. I am thinking that the vent valve is clogged/broken so it wont hold pressure. Does anyone know a fix for this, or able to verify that the diagnosis sounds correct?
11-08-2010, 07:24 AM
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Take the hose off the actuator on the throttle body, take the hose off the vacuum pump, pull the actuator in all the way and put your finger on the hose that connects to the vacuum pump to plug it off. If it stays as it is, it's OK, if it slowly releases, there's a leak in the hoses or the actuator itself.
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11-08-2010, 07:25 AM
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Why doesn't this stupid forum let you edit posts?!?!? QW is way better, much better advice too.
That should read:
"Take the hose off the vacuum pump, pull the actuator in all the way and put your finger on the hose that connects to the vacuum pump to plug it off. If the actuator stays as it is, it's OK, if it slowly releases, there's a leak in the hoses or the actuator itself."
That should read:
"Take the hose off the vacuum pump, pull the actuator in all the way and put your finger on the hose that connects to the vacuum pump to plug it off. If the actuator stays as it is, it's OK, if it slowly releases, there's a leak in the hoses or the actuator itself."
