Finally fixed the cruise control
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 983
Likes: 1
From: Bergen County NJ
Finally fixed the cruise control
I see questions on this topic from time to time, so I figured I'd post what I found while fixing my CC. Lots of credit goes to fellow forum members who have posted advice on this topic.
When I bought the car (7/02), the CC wasn't working, and although I don't use it often, it drives me nuts knowing that there is something on the car that's not right. Here's my CC repair adventure.
-Replaced the broken vacuum check valve, which is located under the passenger side fuel injector cover. Obviously this needed fixing, but it didn't solve my CC problem.
-Checked all the vacuum lines to ensure that a vacuum leak wasn't the problem.
-Dissasembled the pass side lower dash, exposed the CC module and performed the troubleshooting flowchart from the GM manual. This confirmed thet the ECM, vacuum servo, CC module and wiring were OK, but did not solve my problems.
-Checked the cruise control and ASR/throttle cables to ensure that there wasn't too much slack. Didn't need adjusment, I still had no CC.
-Removed the drivers side lower dash panel and checked the position of the brake and clutch switches. On a 6-spd there are 3 switches, 2 actuated by the brake pedal (brake light switch and CC vacuum cut-off) and one on the clutch pedal (a CC cut-off switch). Turns out that the mounting bracket/retainer for the brake pedal switches was broken. It would hold the stoplight switch in position, but wasn't keeping the CC vacuum cut-off in place. The part is made of plastic and will break if the switches are adjusted too close to the pedals. The part# for this piece is 3537079 and it cost ~$6 from the dealer. This part is common on '93-'96 vettes, the pre-'93 cars used a metallic retainer.
Now I have cruise control and I'm very, very happy :D. I hope this story helps others solve their CC problem(s) without all the effort that I had to go into.
[Modified by sraft, 1:48 PM 11/8/2003]
When I bought the car (7/02), the CC wasn't working, and although I don't use it often, it drives me nuts knowing that there is something on the car that's not right. Here's my CC repair adventure.
-Replaced the broken vacuum check valve, which is located under the passenger side fuel injector cover. Obviously this needed fixing, but it didn't solve my CC problem.
-Checked all the vacuum lines to ensure that a vacuum leak wasn't the problem.
-Dissasembled the pass side lower dash, exposed the CC module and performed the troubleshooting flowchart from the GM manual. This confirmed thet the ECM, vacuum servo, CC module and wiring were OK, but did not solve my problems.
-Checked the cruise control and ASR/throttle cables to ensure that there wasn't too much slack. Didn't need adjusment, I still had no CC.
-Removed the drivers side lower dash panel and checked the position of the brake and clutch switches. On a 6-spd there are 3 switches, 2 actuated by the brake pedal (brake light switch and CC vacuum cut-off) and one on the clutch pedal (a CC cut-off switch). Turns out that the mounting bracket/retainer for the brake pedal switches was broken. It would hold the stoplight switch in position, but wasn't keeping the CC vacuum cut-off in place. The part is made of plastic and will break if the switches are adjusted too close to the pedals. The part# for this piece is 3537079 and it cost ~$6 from the dealer. This part is common on '93-'96 vettes, the pre-'93 cars used a metallic retainer.
Now I have cruise control and I'm very, very happy :D. I hope this story helps others solve their CC problem(s) without all the effort that I had to go into.
[Modified by sraft, 1:48 PM 11/8/2003]
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 983
Likes: 1
From: Bergen County NJ
Re: Finally fixed the cruise control (perryroger86vette)
Here's a link to the file. I scanned the section from the '94 manual. The procedure is pretty specific to '94 (and years have the same electronics), so I'm afraid that it might not be too useful for you. Hopefully it will at least get you going in the right direction.
http://userweb.cybernex.net/sraft/94...oubleshoot.pdf
http://userweb.cybernex.net/sraft/94...oubleshoot.pdf
