Cruise control INOP

[OkieTruckerD]

My cruise control no longer works, before it quit working, it made my truck buck and jerk. Is this a vacuum issue or an electrical issue? The fuse under the dash is intact. Any and all information would be greatly appreciated.

 

[gandalf]

How's the horn? On my '86 the horn and the cruise were running off the same relay. I have no idea whether they continued that through the '89 model year. On the '86 the relay was under the dash, over toward the center hump.

 

[OkieTruckerD]

Good question, the horn works flawlessly

 

[87crewdually]

http://www.members.shaw.ca/k2pilot/Cruise control diagnostics.doc

 

[OLDBULL8]

This might help you. Ckicky then Print them out.

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[OkieTruckerD]

Using the help of ringpinion.com's calculators, it turns out that my truck has an improperly tagged axle, which means I still have 4.10's in the axle housing, which is all sorts of craptastic. Thank you for your help, folks, and I already have another axle (which I hope this one actually has 3.55's in it, it says it does, I'm going to have to crack it open, and count the teeth).

 

[Brianedwardss]

There's a factory relay on my '88 on the corner of the firewall near the brake booster. Im guessing it's the cruise/horn relay but I could be wrong.

 

[Silver Burner]

Subscribed. The cruise in my 91 does not work and everything appears to be intact

 

[f-two-fiddy]

I'd bet it's the brake switch.