Cruise Control - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

View Poll Results: Cruise Control Problem...
Cruise Control Module 0 0%
Cruise Control Servo 4 66.67%
Toggle Switch on Steering Column 1 16.67%
CC Relay Replacement 1 16.67%
Voters: 6. You may not vote on this poll

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Old 03-04-2006, 05:03 PM   #11
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Quote:
Originally Posted by jr's3800
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ok so nhow that i know there is supposed to be a light, the problem is probably that either the switch is bad or the CCM is bad....right?
No light for the Bonneville...

Ypu need to know if the ECM is actually seeing the request when you turn the cruise on and try to set it... This may point you in the direction of the issues... The ECM looks at the brake switch, as well as other various info regaurding the Cruise Control... But in order to know where to begin you need to know if the ECM sees you turn on ( or request ) Cruise controll... The Cruise control module under the hood is controled by the ECM...
and how can i find out if the ecm is seeing my request?
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Old 03-04-2006, 05:12 PM   #12
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Quote:
Originally Posted by wjcollier07
Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
ok so nhow that i know there is supposed to be a light, the problem is probably that either the switch is bad or the CCM is bad....right?
No light for the Bonneville...

Ypu need to know if the ECM is actually seeing the request when you turn the cruise on and try to set it... This may point you in the direction of the issues... The ECM looks at the brake switch, as well as other various info regaurding the Cruise Control... But in order to know where to begin you need to know if the ECM sees you turn on ( or request ) Cruise controll... The Cruise control module under the hood is controled by the ECM...
and how can i find out if the ecm is seeing my request?
You'll need a scantool for that one

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Old 03-04-2006, 05:15 PM   #13
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Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
ok so nhow that i know there is supposed to be a light, the problem is probably that either the switch is bad or the CCM is bad....right?
No light for the Bonneville...

Ypu need to know if the ECM is actually seeing the request when you turn the cruise on and try to set it... This may point you in the direction of the issues... The ECM looks at the brake switch, as well as other various info regaurding the Cruise Control... But in order to know where to begin you need to know if the ECM sees you turn on ( or request ) Cruise controll... The Cruise control module under the hood is controled by the ECM...
and how can i find out if the ecm is seeing my request?
You'll need a scantool for that one

ohhhh...GREATT, so how much will that set me back?
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Old 03-04-2006, 05:23 PM   #14
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Quote:
Originally Posted by wjcollier07
Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
ok so nhow that i know there is supposed to be a light, the problem is probably that either the switch is bad or the CCM is bad....right?
No light for the Bonneville...

Ypu need to know if the ECM is actually seeing the request when you turn the cruise on and try to set it... This may point you in the direction of the issues... The ECM looks at the brake switch, as well as other various info regaurding the Cruise Control... But in order to know where to begin you need to know if the ECM sees you turn on ( or request ) Cruise controll... The Cruise control module under the hood is controled by the ECM...
and how can i find out if the ecm is seeing my request?
You'll need a scantool for that one

ohhhh...GREATT, so how much will that set me back?
Not sure guy... I just don't want to see you buy what you don't need to fix the problem.. Its possible to have a bad stalk, bad brake switch, Bad Module.... I had a failure on mine at one point that turned out to be a bad or collapsed vacume line.. But my 95 and the 91 used the same cruise Module... Swap them both around and tehy were both good... Hooked up the scantool later on my ( 95 ) and had a code for Cruise Control Vacume Vent solenoid error( it had no vacume ) I replaced all of the Vac lines to it and never had another issues... After that I replaced all of the lines on my 91...lol

The ECM for the 88-91 3800 Bonnies is not as adept or as smart as the 94-95 PCM'* and don't tend to notice issues early on...

Do you have any codes... If memory serves there are one or 2 codes that will not set off the SES but could possibly be stored in the computers memory..

Have you checked all of the Vacume lines running to the cruise control module? They tend to deteriorate in a bad way by the time the cars are 9 or 10 years old..

Good Luck

If there is anything else we can answer, please let us know

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Old 03-04-2006, 05:38 PM   #15
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Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by wjcollier07
ok so nhow that i know there is supposed to be a light, the problem is probably that either the switch is bad or the CCM is bad....right?
No light for the Bonneville...

Ypu need to know if the ECM is actually seeing the request when you turn the cruise on and try to set it... This may point you in the direction of the issues... The ECM looks at the brake switch, as well as other various info regaurding the Cruise Control... But in order to know where to begin you need to know if the ECM sees you turn on ( or request ) Cruise controll... The Cruise control module under the hood is controled by the ECM...
and how can i find out if the ecm is seeing my request?
You'll need a scantool for that one

ohhhh...GREATT, so how much will that set me back?
Not sure guy... I just don't want to see you buy what you don't need to fix the problem.. Its possible to have a bad stalk, bad brake switch, Bad Module.... I had a failure on mine at one point that turned out to be a bad or collapsed vacume line.. But my 95 and the 91 used the same cruise Module... Swap them both around and tehy were both good... Hooked up the scantool later on my ( 95 ) and had a code for Cruise Control Vacume Vent solenoid error( it had no vacume ) I replaced all of the Vac lines to it and never had another issues... After that I replaced all of the lines on my 91...lol

The ECM for the 88-91 3800 Bonnies is not as adept or as smart as the 94-95 PCM'* and don't tend to notice issues early on...

Do you have any codes... If memory serves there are one or 2 codes that will not set off the SES but could possibly be stored in the computers memory..

Have you checked all of the Vacume lines running to the cruise control module? They tend to deteriorate in a bad way by the time the cars are 9 or 10 years old..

Good Luck

If there is anything else we can answer, please let us know
well there are no codes, i checked that..paperclip style...i will check on the vacuum lines and as far as i know, they are all good...but you said running to the CCM i thought the only vacuum lines were running to the CCS....if i go and track down the location of the CCM, is there any visual things that i would notice that would be faulty about it...?

also ....i don't know if there is something that is supposed to happen when you turn on the cruise besides not having a light...like a sound? could i put the car on jack stands and put it in gear and try to set the cruise and see what happens with something under the hood?...
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Old 03-04-2006, 05:55 PM   #16
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There is no light, no sound. As for seeing anything under the hood, not sure if you will see anything, except if it works, it will be moving the throttle cable to keep the speed.
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Old 05-27-2006, 07:12 PM   #17
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ok, well its been a while since i have responded to this thread...

there is vacuum pressure, i pulled the lines of and i heard HISSSS, so, i am gonna go ahead and say that it is most likely a bad CCS. Would my assumption be correct? Also...there is one small vacuum line and 1 larger rubber hose running to the CCS. Now the small one, which i assume is the vacuum line, runs to the vacuum pump, the larger one runs straight through the firewall...i really dont know what that would be. I think i found the CCM, it looks like it is behind the left strut tower...

ok now, i am wondering if i just replace the CCS that everything would just be dandy..because vacuum pressure seems to be fine.

here is a pic of the strut tower..see the black box at the top right corner? what is that? I thought that might be the CCM

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Old 05-28-2006, 09:56 PM   #18
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thats the windshield wiper motor
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Old 05-29-2006, 01:56 AM   #19
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well see now i just feel like a complete idiot...
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Old 05-29-2006, 11:50 AM   #20
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Even the TPS can cause issues with cruise.
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