Mechanics

CADILLAC DEVILLE CRUISE CONTROL PROBLEM

1992 Cadillac Deville • 135,000 miles

Hi I am looking at a chiltons manuel to diagnose a cruise control problem. I reposted sorry. But Is a speed sensor on the 1992 cadillac deville related to the cruise control. I have checked the fuse it was good. Their is no leak in the vacuum. I changed the cruise lever out. I checked for power it has power. I bought a servo on ebay that was supposobly in working condition. Where is the stepper motor located. From the sounds of it. It is the thing that attaches to the throttle cable and the cruise cable. What is a transducer and how do you test it. Also is their a way to test the cruise servo. Thanks.
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Sean03
September 19, 2012.




Sorry cadieman I was using my phone and I accidentally pushed the flag for review button. I didn't mean to.

Tiny
Sean03
Oct 15, 2012.
Ok so I did jump the gray and brown wires. I took a piece of wire put one on the wire strip and one on the other and it made no differance.

Tiny
Sean03
Oct 15, 2012.
That would indicate the brake switch is not the cause of the problem.

We have been going around in circles and don't seem to be getting anywhere.

I did not go through all the post completely and might have missed out something so fill me in if necessary.

Is the Orange Indicator Light now showing when the switch is turned on? This light must be indicating so that the cruise control system is in standby mode for it to work when cruise speed is set.

KHLow2008
Oct 15, 2012.
No the orange light is still not on. Me and cadieman have checked power at the switch their is power going to the switch. I also tested both sides like cadieman wanted me to and I had power. I turned the car to the run position and pushed the off an warmer and let it go through then I turned the lever on and it shows E. 7.0 when I push the brake it switches from E.7.0 to E.0.0 same thing if you try to set it or resume. We just tried jumping the grey and brown wire on the brake switch. It made no difference the light did not come on.
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Tiny
Sean03
Oct 15, 2012.
You should get that resolved first as that is the main on off for the system. Without this light turning on, the cruise is never going to work, unless the problem is only a faulty bulb.

When switch is turned on, Check the Brown wire at brake switch for battery voltage.

KHLow2008
Oct 15, 2012.
Ok it had 11.5 volts I ground the back probe to metal and put the red probe on the wire.

Tiny
Sean03
Oct 15, 2012.
The 11.5 volts indicates pwer is getting there.

There are 4 wires at brake switch, one should be hot at all time and one more only when the cruise control switch is turned on with ignition on. Is that what you are having?

KHLow2008
Oct 15, 2012.
No none of them are hot when the car is off. When you turn the cat on then it gets voltage at all of the wires. Their are another set of wires on the brake switch. Orange and two light blues that are connected together in the switch. The orange has 11.5 volts and the light blue has no power. I also tested the cruise switch above the brake switch and everything their has 11.5 to 9.5 volts.

Tiny
Sean03
Oct 16, 2012.
Check for voltage on the pink wire at the lever connector with the key on. This is what controls the power to the lever. If no power is their check # 7 fuse 20 amp.

Cadieman
Oct 16, 2012.
Hey guys sorry I am back in the hospital again. They think I have Stevens Johnson's disease. I looked like a lobster yesterday I was red red and had no energy and my skin had hot heat coming off of it and my eyeys were teice the size the should have been. They were thinking of sowing my eyelids shit so nothing bad would happen. So they are giving me steroids to cure this. A few people have died from this but I know I can pull through it. I will work on it once I get better. Maybe Friday at the earliest. Thanks.

Tiny
Sean03
Oct 17, 2012.

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