Hello,

I just bought an 84 Olds 98 with 65K on it.

The cruise does not work. Fuse is OK. What should I check next?

Thanks

 

Ebay, for one of these:

http://www.ebay.com/itm/1984-OLDSMOB...2cd6e7&vxp=mtr


and perhaps one of these as well:

http://www.ebay.com/itm/1984-OLDSMOB...ebbcaf&vxp=mtr


Here they are as a pair:

http://www.ebay.com/itm/1984-Oldsmob...b9659a&vxp=mtr


If you're going to keep this car for any length of time, these are well worth the investment.

 

Thanks. I have them both. I was wondering if there was a common failure that I could replace.

Does the servo motor or control module ever go?

 

Sure, why do troubleshooting for free if you can spend money on parts that you may or may not need...

Sorry, but this happens a lot and the only explanation I can come up with is that people have too much money. In that case, I'll provide my mailing address.

By the way, the Electrical Troubleshooting Manual has the troubleshooting info for the cruise control.

 

A couple easy checks under the dash...
Look at the thin ribbon cable coming from the steering column switch to the control module. It can burn out at the connector between the two.
Also check to see if the plunger at the brake pedal holds vacuum. Brake depressed, vacuum should be depleted.
The electronic control unit is fairly robust.
I would suspect the two items above (since I have seen those fail), and if they look good, the servo under the hood may not be holding vacuum due to cracked rubber bellows or defective valves. In fact, check the bellows first as it is easiest.

If you plan on keeping this car a while, a service manual is highly recommended. The GM one preferred, or a Haynes in last resort. Never a Chiltons though.

 

As he himself said, he already has one. He just needs to look in it!

 

I was not for sure what he had as I did not wish to go looking at ebay links.
Looks like he is ready for action!

 

I have extra bellows here if that ends up being the culprit

 

Thanks. I went to bone yard and for $13.00 found a servo on an 85 Buick. She took right off after pressing "set".