Cruise Control on 1987

[Bob G]

The cruise control on my 1987 Avanti works intermittently.  Any idea as to the cause/how to repair it?

Thanks,

Bob

[ronmanfredi]

4 hours ago, Bob G said:

The cruise control on my 1987 Avanti works intermittently.  Any idea as to the cause/how to repair it?

Thanks,

Bob

Intermittent suggests to me that it might be a bad connection in one of the system connectors or a switch adjustment that is on the edge of out of range.  I'm not sure of the style of cruise that is on your model.  My 82 wasn't working when I got it and the magnets had fallen off the driveshaft.  Once replaced, I found the brake switch out of adjustment and once that was fixed, I had to adjust the speed screw in the small box until it set and held the right speed.  On my 89, I found a bad fuse and a corroded connection on one of the plugs.  Once I fixed those, then I had to adjust the speed screw on that one as well.  So the first thing that I would do is disconnect, inspect and reconnect each electrical plug in the system to be sure the contacts are clean and working.  I'm thinking your model has a speed sensor connected to the speedometer cable at the transmission.  If so, you need to check the connection there.  If it has that, then it doesn't have magnets on the drive shaft.  The brake pedal activates a switch to kill the cruise when you press on it in addition to the brake light switch.  You need to check and be sure it is working correctly with good electrical connections.  Don't forget to check the control switch connections at the steering column also.