I need to know the pedal switch wiring set-up on one of these cars. Does the cruise control wiring plug into the clutch neutral start switch or does it have a seperate switch? I'm installing cruise on my '88 coupe and can't figure out where the harness from the ECM is supposed to plug into. For the not too technically inclined members out there, if you could just look under your dash, how many pedal switches are on your clutch pedal? How many wiring connections are on each switch? Are any wiring connections on the pedals left open? Help!

Hi, Renman.
First of all, welcome to the Forum.
I'm afraid I can't answer your question, as my 88 Duke is an automatic, and also doesn't have cruise.
BUT...
Are you aware that, unlike any other years/models, the 87 and 88 Duke have the cruise control circuitry built in to the ECM?
It appears that you do, but I wanted to call that to your attention, just in case.

This also serves to "bump" your question back to the top of the first page, so that someone who does know the answer might get a chance to read it.

Best of luck!

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Raydar

From the Department of Redundancy Department.

There should be 2 switches on the clutch pedal. The top one has a 2 terminal connector and is the start safety switch. The other one is for the cruise control and is mounted below the safety switch. It also has a 2 terminal connector.

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Rod Schneider, Woodstock, Ga.
White 88 GT :)

So if I'm understanding you correctly, there is an empty connection on both the clutch cut-off switch and the cruise switch? I noticed from your post that you have an '88 GT. Was the information you gave me about your GT or a Duke? I do know that they have different systems. Not trying to be a butthead or anything, just making sure that we're talking about the same thing.

According to the 88 shop manual, the clutch switches have the same function on both the 6 and the 4 cylinder. There should be 2 of them. The cutout switch has only 1 pair of contacts and they will be closed (continuity) when the pedal is depressed. The cruise switch also has 1 pair of contacts and they will be closed when the clutch pedal is not pushed. Both switches do have an additional place on the housing that looks like another plug could be plugged in, but there are no terminal pins installed on either of them.
The big difference (as you are aware) between the V-6 and L-4 systems is where the "brain" for the cruise is located. The V-6 has a seperate module mounted on the tunnel near the drivers left leg and the L-4 has the control circuits incorporated into the ECM. (My 84 L-4 had the cruise circuits integrated into the speedometer!) Otherwise, all the switches are the same layout and function for all the year and engine combos.

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Rod Schneider, Woodstock, Ga.
White 88 GT :)

Thanks so much!! I guess the reason that my second switch on the clutch pedal has another set of plugs was because the system came out of an automatic, and it needs them to trigger torque converter lock-up. I'll probably take the other set of terminals out, now that I know I won't need them.

I guess now all that I've got to do is to hurry up and get the fastback conversion on so that I've got the rest of the wiring. I don't have my 88 shop manual yet, but it was driving me nuts!!

Again, I really appreciate the help. Thanks.