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How can I determine if steering wheel controls work?

Discussion in '6.9L IH & 7.3L IDI Diesels' started by mexicanjoe, Jun 14, 2019.

  1. mexicanjoe

    mexicanjoe Full Access Member

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    Guys Ive been trying to fix my cruise control on my '89 F-250... I have vacuum to the servo/actuator however i cant get the thing to "stay". Ive looked at my fuses, wires and hoses and still NADA! anybody have any hacks I can use to trouble shoot?
    Thanks......... su amigo : Mexicanjoe!
     
  2. 79jasper

    79jasper Chickenhawk

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    Search around, should be able to find the resistance values.
    Could be the clock spring.
    Horn work?
    Third brake light?
    There's also a relay buried behind the dash.

    Sent from my SM-N960U using Tapatalk
     
  3. YJMike92

    YJMike92 Full Access Member

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    If the horn doesn't work the clockspring would be my first guess. You might try using your foot to pull the brake and clutch pedal up while trying to set the cruise. Some times the switches get out of adjustment and the cruise thinks your foot is on the pedal. I probably have some troubleshooting info somewhere. I can't look now
     
  4. renjaminfrankln

    renjaminfrankln Supporting Member Supporting Member

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    I'm trying to get mine working. I found the troubleshooting tips in the tech section. But I want to check the really common problems before I pull out the fluke and start reading ohms and stuff.

    Nothing happens when I push "on" on the steering wheel. I expected a dash light or something. If I push on and then set, nothing happens.

    My clutch/starter interlock and the brake light switch both work normally.
    Horn works.

    So I need to check for a burned out 3rd brakelight and also for a blown fuse. Anything else?

    Going on the first road trip since I bought it a year ago this weekend. Not far just about an hour and a half each way. Going to visit the in-laws and try to fix my father in law's duramax (LLY, I think it has a chafed injector harness).
     
  5. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    No third brake light on a bricknose, pull the insert off the steering wheel (two screws on backside of the wheel) and double check the wiring, and clean the contacts. That fixes the majority of the electrical issues with the older vacuum system.
     
  6. YJMike92

    YJMike92 Full Access Member

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    I have two trucks a 93 and a 94. Neither truck has any cruise lights. No light when the on switch is pushed or when the cruise is set.
     
  7. renjaminfrankln

    renjaminfrankln Supporting Member Supporting Member

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    Thanks for the info guys. I do have a 3rd brakelight up on top of the cab, not sure if it works or not.
     
  8. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    Third brake light wasnt factory till 94, they did have a clear cargo light on top of the cab up till 93, its possible someone added in an aftermarket unit, but Ive only seen that done a few times.
     
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  9. 79jasper

    79jasper Chickenhawk

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    There's no cruise light. The new body style half tons got it in 96.
    3/4+ didn't get them until later. 99 maybe?

    Sent from my SM-N960U using Tapatalk
     
  10. chris142

    chris142 Full Access Member

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    If you remove the steering wheel there are 2 contacts that rub on the back of it. Mine wore out. I soldered bumps on them and have cruise again
     
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  11. Golden Helmet

    Golden Helmet Full Access Member

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    Have you checked the cable going from the cruise servo to the IP? That's what was wrong with my cruise control, replaced the cable and it worked again.
     

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