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Good evening, I'm hoping I can gain some help on this as I'm at my whits end.
I have a 1992 f150 5.0 with a non functioning vacuum controlled cruise control servo.
Now I replaced the canister that connects to it because there was a hole, however this did not solve my issue.
I checked all vacuum lines and did not find any leaks or anything visually wrong.
I know my clock spring is in working order as well as all of my fuses being good.
Brake lights also function normally and everything else seems to be good
I believe to have narrowed it down to it being an electrical issue, and the servo not getting any signal.
Now my problem is i have no idea how to test the electrical connector on the servo as well as the buttons on the steering wheel as those would be my last guess on why its not working.
If anyone has any ideas or tips that would be greatly appreciated.
First thing to try is pulling up on your brake pedal as you try to engage the cruise. You are turning it on before you try to engage, right? It resets to off every time you start the engine.
Clock springs are applicable to airbag trucks which a 92 F150 shouldn't have.
Did you swap a different column into the truck?
Also, check the brake switch to see if it is working or if it is leaking brake fluid.
If you still have the red one those are the ones that potentially catch fire and there is a recall on some of the model years along with an updated replacement part.
I think a 92 will have this switch just above the RABS valve located near frame under drivers feet like the 93 trucks do.
Take a look to see
First thing to try is pulling up on your brake pedal as you try to engage the cruise. You are turning it on before you try to engage, right? It resets to off every time you start the engine.
Yes I press the on button and then press the set button. I'll try pulling up on the brake pedal and see if that changes anything.
Clock springs are applicable to airbag trucks which a 92 F150 shouldn't have.
Did you swap a different column into the truck?
Also, check the brake switch to see if it is working or if it is leaking brake fluid.
If you still have the red one those are the ones that potentially catch fire and there is a recall on some of the model years along with an updated replacement part.
I think a 92 will have this switch just above the RABS valve located near frame under drivers feet like the 93 trucks do.
Take a look to see
Thanks for the reply. Ive searched for switch all night last night and can not for the life of me find it.
There is no brake pressure switch on 1992 and older trucks. The speed control system is vacuum operated. It does use the brake on/off (BOO) switch to deactivate the electronic servo, but there is also a vacuum dump valve mounted on the brake pedal assembly.
There is no brake pressure switch on 1992 and older trucks. The speed control system is vacuum operated. It does use the brake on/off (BOO) switch to deactivate the electronic servo, but there is also a vacuum dump valve mounted on the brake pedal assembly.
Thank you. It was driving me crazy trying to find it
[QUOTE=rla2005;20953970]Some helpful information about the vacuum servo Speed Control system used on 1992 and earlier EFI trucks:
Thanks for the info. With that I was able to test my buttons and upon doing that I found out that ohms fluctuate heavily while turning the steering wheel. Next I would assume I need to clean the slip rings like it says in the diagram?
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