Cruise control problems
Thread Starter
Instructor
Joined: Mar 2003
Posts: 118
Likes: 0
From: Shrewsbury MA
Cruise control problems
When I recently replaced the brake booster on a 94 LT1 6 speed, now the cruise control doesn't work. Checked the fuse, ok. Checked the cruise control servo for leaks, none. I can not find a vaccumn issue, and electrically it is continuous between the 1st, 3rd, and 5th positions. It is also continuous between the 2nd and 4th positions.
I am thinking either the clutch or brake switch but I have no clue how to adjust. Does anyone have a procedure how to adjust these?
All help appreciated
I am thinking either the clutch or brake switch but I have no clue how to adjust. Does anyone have a procedure how to adjust these?
All help appreciated
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
There are two switches on the brake pedal, one is for brake lights and the other is for the cruise as you probably already know. These switches slide fairly easy inside their bracket and you probably raised the pedal too high when replacing the booster and pushed the switch away from the pedal. Adjust the switch so the plunger is almost completely depressed. This should get the cruise working again BUT make sure the brake lights are working properly too, that switch is mounted the same way. You may have to do some fine tuning of both switch positions to get it right again.
Melting Slicks
Joined: May 2001
Posts: 3,014
Likes: 18
From: Raleigh, NC
Try holding the 'set/accel' slide switch to the right (llike you were trying to set the cruise with it) for 5-10 seconds and see if the cruise activates.
Mine was acting funny after a PCM removal, clutch swap, and brake fluid change. I did as you did and checked fuses and continuity at the plug, all seemed OK. One night I held the switch out of frustration on the highway. After 10 seconds of holding it, the system activated and has worked fine ever since.
Mine was acting funny after a PCM removal, clutch swap, and brake fluid change. I did as you did and checked fuses and continuity at the plug, all seemed OK. One night I held the switch out of frustration on the highway. After 10 seconds of holding it, the system activated and has worked fine ever since.
Thread Starter
Instructor
Joined: Mar 2003
Posts: 118
Likes: 0
From: Shrewsbury MA
It was the brake pedel switch, not sure whitch one, but it works. I figured it out going to work this AM, I pulled up on the brake pedel with my foot and pressed the set button and it worked. That told me the switch was not being depressed enough by the brake pedel. Did the underdash switch adjustment and all's good
Thanks for the help
Thanks for the help
Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
Originally Posted by neat
Try holding the 'set/accel' slide switch to the right (llike you were trying to set the cruise with it) for 5-10 seconds and see if the cruise activates.
Mine was acting funny after a PCM removal, clutch swap, and brake fluid change. I did as you did and checked fuses and continuity at the plug, all seemed OK. One night I held the switch out of frustration on the highway. After 10 seconds of holding it, the system activated and has worked fine ever since.
Mine was acting funny after a PCM removal, clutch swap, and brake fluid change. I did as you did and checked fuses and continuity at the plug, all seemed OK. One night I held the switch out of frustration on the highway. After 10 seconds of holding it, the system activated and has worked fine ever since.
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