Cruise control problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

winnipegk5 · 08-31-2004, 07:16 PM

I have a 79 Suburban that I am trying to get the cruise working on. It is a 2wd 350 AT. So far I have:
1) Power from the switch to the controller it clicks on and off when I push the end of the turn signal
2)The speedo works fine and is accurate
3) If I provide vacum to the throttle actuator it pulls the throttle linkage.

Nothing happens when I put the cruise on at highway speed. I can here it clicking under the hold but it will not maintain the speed.
Any tips would be much appreciated.

Thanks in Advance
Mike

the baron · 09-01-2004, 03:41 AM

have you already checked the adjustment of the switch situated on the brake pedal ?

If that one is bad adjusted , your C.C. system never will engage

winnipegk5 · 09-01-2004, 06:50 AM

No, but I will check it this morning. Does anbody have a wiring/vacum diagram?? My manual has 81 and up only.

Mike

the baron · 09-01-2004, 09:42 AM

I have a 1980 Service Manual , I don't know if if it will help you or not...

Greenlee · 09-01-2004, 09:58 AM

I'm interested in this question too. The cruise on my 76' works sometimes, and other times it doesn't. I hope it isn't the turn signal button as I notice in the LMC catolog that the turn signal assembly with cruise cost something like $129.00.

08-31-2004, 07:16 PM	#1
winnipegk5 Registered User Join Date: Sep 2003 Location: Winnipeg,MB,CANADA Posts: 35	Cruise control problems I have a 79 Suburban that I am trying to get the cruise working on. It is a 2wd 350 AT. So far I have: 1) Power from the switch to the controller it clicks on and off when I push the end of the turn signal 2)The speedo works fine and is accurate 3) If I provide vacum to the throttle actuator it pulls the throttle linkage. Nothing happens when I put the cruise on at highway speed. I can here it clicking under the hold but it will not maintain the speed. Any tips would be much appreciated. Thanks in Advance Mike

09-01-2004, 03:41 AM	#2
the baron Registered User Join Date: Mar 2003 Location: Liège , Belgium Posts: 263	have you already checked the adjustment of the switch situated on the brake pedal ? If that one is bad adjusted , your C.C. system never will engage __________________ 1982 Suburban 2WD , 260ci Olds engine,TH400 , will get a 1979 front clip , might be ready in ... 2016 1985 Chevy Van ( 305/350 ) , "Kellogg" equipped , my actual D.D. 1960 Girl Friend , frame still good , body has some dents

09-01-2004, 06:50 AM	#3
winnipegk5 Registered User Join Date: Sep 2003 Location: Winnipeg,MB,CANADA Posts: 35	No, but I will check it this morning. Does anbody have a wiring/vacum diagram?? My manual has 81 and up only. Mike Last edited by winnipegk5; 09-01-2004 at 06:50 AM. Reason: Spelling

09-01-2004, 09:42 AM	#4
the baron Registered User Join Date: Mar 2003 Location: Liège , Belgium Posts: 263	I have a 1980 Service Manual , I don't know if if it will help you or not... __________________ 1982 Suburban 2WD , 260ci Olds engine,TH400 , will get a 1979 front clip , might be ready in ... 2016 1985 Chevy Van ( 305/350 ) , "Kellogg" equipped , my actual D.D. 1960 Girl Friend , frame still good , body has some dents

09-01-2004, 09:58 AM	#5
Greenlee Registered User Join Date: Jun 2004 Location: El Lago, TX Posts: 1,668	I'm interested in this question too. The cruise on my 76' works sometimes, and other times it doesn't. I hope it isn't the turn signal button as I notice in the LMC catolog that the turn signal assembly with cruise cost something like $129.00.



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