I have been working to get the electronic cruise servo unit to work with my 3800. I got it all wired up based on the instructions I was given and now when car is started the cruise control makes the car accelerate (cruise unit cable just starts opening the throttle body like I am accelerating). This is with the cruise disengaged. I have an OBD2 unit hooked up and can see what it is doing. If I unplug the cruise unit it goes back to normal and runs smoothly. Any help or suggestion would be appreciated.

Thanks Jonathon.

[This message has been edited by John316 (edited 07-24-2013).]

OBD2 scanner won't tell you anything about it.

Check the wires at the servo to see if they are connected to the correct switch. Use a trouble light.


Pin A - Gray - Gets power whenever the cruise switch is on

Pin B - Dk Blue - Gets power when the set button is pressed (and the cruise switch is on)

Pin C - Gray/Black - Gets power when the Resume/Accelerate button is pressed (and the cruise switch is on)

Pin D - Brown/White (or Purple) has power whenever the cruise switch is on, and the brake is not depressed

Pin G - White (or Lt. Blue) has power whenever the brake pedal is pressed

(My guess is the Gray and the Gray/Black wires are swapped)

I had success with my installation when I used a relay to provide a ground signal to the module.
//www.fiero.nl/forum/A...110502-2-102406.html

I am somewhat color blind and greys and blacks look very similar. I will check the wires on Monday.

All the wires to the servo checked out. What should I check next?

If all the wires terminate at the correct pins and give the functions they are supposed to as checked with a trouble light, however the Servo when activated does nothing but accelerates, then the servo would be bad.

I however would re-check that the premise of that statement was correct before assuming the conclusion.

I just figured out how to make an idiot light and checked everything and it works correctly. The servo I am using has the initials AR on it. Is this the right one?

Yes.

If all the inputs are working correctly, and the servo goes into an acceleration mode as soon as you turn it on, then the problem has to be with the servo.

Okay. Besides the AR unit is there others options? I have a few different ones laying on the shelf. Thanks again PhoneDawgz.

Darn smart phones. Double post sorry.

[This message has been edited by John316 (edited 07-30-2013).]

You can try them. I am not sure if you will have problems with a different labeled one. It seems like they are all wired the same.