1990 EX Cruise Control; Power Issue

[sparkles_n_shit]

So I've been working on my car for quite a while now, and It's been bugging me that my cruise control will not power on. What I mean by that it is that the cruise control button will glow as usual when the headlights are on, but the button will not glow when I try to turn on cruise control, and I have the same issue with the cruise control light in the cluster.



I have swapped out the cruise control computer and the cruise control assembly under the hood seems to be in good condition.

I have checked the cruise control fuses and they're all fine, and this is on an automatic car.


If anybody can give me any advice or other ways of checking, it'd be greatly appreciated.


I know that there's a lot of issues with our cruise control systems but it'd be really nice to have it lol.

[MaroonPünSaloon]

Does your cruise control work at all, or is it just the light that's failing to stay on?

[deevergote]

That was my first thought as well. At 20+ years old, the bulbs could simply be burned out!
Are you 100% positive that the replacement computer is functional?

Most people on here often just remove cruise control when it stops working. My own has been gone for over a decade. Of course, I live in New Jersey. We have so much traffic that there's no real need for cruise control. You're hitting the brake far too often for it to really be useful!

[sparkles_n_shit]

That was my first thought as well. At 20+ years old, the bulbs could simply be burned out!
Are you 100% positive that the replacement computer is functional?

Most people on here often just remove cruise control when it stops working. My own has been gone for over a decade. Of course, I live in New Jersey. We have so much traffic that there's no real need for cruise control. You're hitting the brake far too often for it to really be useful!

Yeah haha the cruise control doesn't work at all, it's not just the bulbs.

The previous computer did the same thing, so I don't suspect the computer.

Is there any relays for the cruise control I could check/replace?

[Losiracer2]

if you remove the driverside fender liner, there is a vacuum box visible, tucked up inside the fender, that is supposed to "hold" the pedal, once you set the cruise.

Make sure the nipple on the box and the hose going to it through the fender are in good shape.

I seem to be having a problem with it holding the set speed when i engage it, so I'm thinking my vac. box might have a leak or isn't sealing right.

[dahubby]

I had the same problem turned out to be the clutch pedal sensor for the cruise. I'm not sure if you have an automatic or stick, but for my stick, there was a sensor above the clutch pedal that was bad. Once I changed it, the cruise worked. Good luck with it though