Cruise control wiring
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Junior User
Joined: Nov 2007
Posts: 65
Likes: 1
From: Vancouver, BC, Canada
Cruise control wiring
I am in the process of installing the factory speed control into my '83. It has not been too complicated thanks to all the info I've found here. However, it still doesn't work!
I've gone through the diagnostics I've found through several searches....now I think I'm on the right track.
The problem is probably because the steering column I put in came from a '90 with manual trans, and the rest of the cruise components came from an '86 with an auto trans.
Somewhere there is a clutch switch wire to de-activate the cruise control when the pedal is depressed.
I don't have the switch (yet) but if I can find the wire, maybe I can make the system work.
I can't figure out what colour that wire is. It might be a white with purple stripe.
Anyone know which wire I should look for?? Then I guess it would be grounded, or cut.
I've gone through the diagnostics I've found through several searches....now I think I'm on the right track.
The problem is probably because the steering column I put in came from a '90 with manual trans, and the rest of the cruise components came from an '86 with an auto trans.
Somewhere there is a clutch switch wire to de-activate the cruise control when the pedal is depressed.
I don't have the switch (yet) but if I can find the wire, maybe I can make the system work.
I can't figure out what colour that wire is. It might be a white with purple stripe.
Anyone know which wire I should look for?? Then I guess it would be grounded, or cut.
Old School Hot Rodder
Joined: Feb 2006
Posts: 6,472
Likes: 11
From: Exmore, VA
The clutch switch is in the light green wire going to the cruise control amplifier and is fed 12V when the clutch is depressed or the brake is applied. The steering wheel switches are the same resistance all the way up including the all electronic ones.
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Junior User
Joined: Nov 2007
Posts: 65
Likes: 1
From: Vancouver, BC, Canada
I found the light green wire and this pigtail on the CC harness. I thought this must be an auto trans bypass pigtail, so if I unplug it, I should be good to go!
Well, it didn't work.
Any other ideas on what I might be missing?
Well, it didn't work.
Any other ideas on what I might be missing?
Old School Hot Rodder
Joined: Feb 2006
Posts: 6,472
Likes: 11
From: Exmore, VA
If you have an automatic you need to leave it in or the system won't cancel on brake application. Unfortunately, these can be a pain to diagnose without the proper test gear. Archion had a malfunctioning cruise on his 86 and it ended up being the servo itself.
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Joined: Jan 2001
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From: Virginia
Yes, the cruise de-activation circuit has a normally closed switch. In other words, the 12v has to go through the switch and the wiring, and be present at the cruise brain board terminal for the cruise to work. This is how all safety circuits are wired, so if a wire got cut, the cruise would not work, if the switch went bad, the cruise would not work, if you lost the 12v supply, the cruise would not work. It's called circuit supervision.
If you want to bypass a circuit like this, you need to hot wire 12v to the proper cruise box terminal.
If you want to bypass a circuit like this, you need to hot wire 12v to the proper cruise box terminal.
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