Cruise control not working

[Dream car 90]

New to registry I just purchased a 1990 zr1 and the cruise control is not working .Where do I start ?

[scottfab]

There is a large diaphragm above the battery.
Check the vacuum hose that runs to it.
It gets brittle being just above the battery and can
develop a leak.

If that seems ok, with the car idling pull in on the diaphragm.
The car should rev.

From there if all is ok then you need to get a code reader or
scanner and read the error codes out and tell us what they are.
Places like Autozone will do it free.
Else we can point you at a procedure that you can read them out
on the dash by shorting to pins together.
Welcome to the group. Be patient. There are many things to learn
if you are willing.

[Dream car 90]

Ok Thanks !

[GOLDCYLON]

New to registry I just purchased a 1990 zr1 and the cruise control is not working .Where do I start ?

Check to make sure your brake switches are centered on the brake pedal arm. If they are off centered the Cruise will not set.

[-=Jeff=-]

also verify the vacuum ball at the left front by the headlight is connected

[Franke]

There is also a cruise fuse in the main fuse block. 3 amp.

[GOLDCYLON]

Yep everything stated above is 100% on target. Welcome to the Forum DC90

[Schrade]

'90 FSM spec CC diagnostic flow chart:

https://lh5.googleusercontent.com/-0uEkieMXW1s/UiFcCpZ5ZPI/AAAAAAAABv4/pTenB0p2nY8/s1880/IMG_5586.JPG

Do you have FSM yet?

You need 11 thumbs to navigate FSM's, and a few piggies too :mrgreen: , and I got a few wrapped around an icy lager ATM.

Post back if you get stuck here... I can scan more snappics.


little more here:

https://lh5.googleusercontent.com/-PhbyrafZEao/UiFe8VkuqtI/AAAAAAAABwI/M3HdVwYOXkI/s1280/IMG_5587.JPG

[scottfab]

Issue with cruise control? Maybe this happened....
Watch this flick about replacing the battery. It covers an issue
with cruise control in it.

http://www.youtube.com/watch?v=jgMa-J8Gqks&feature=player_embedded

[Dynomite]

I will leave cruise control to the Pros ;)

[Dream car 90]

Cruise control put on back burner code 55 priority , plenum removal and new injectors going in .