5 speed swap wiring question

[93GTP]

Does anyone know if there's a write up for wiring in the Clutch Start Switch and Clutch Position Switch (Shift Anticipate Switch)? I have everything I need out of my donor car now but I'm wondering what underdash wiring I may need to pull from the Z34.

Does the auto harness have the wiring needed for these two switches? I'm guessing not, that would be too easy.

[stockgp]

pm brianteel. he could probably help you

[5speedz34]

I doubt the auto harness will have it. There was a write up at 60V6 done by OldSkoolGP, but I don't think he mentioned anything about the switches, since no one really bothers with those.

[Guest TurboSedan]

Clutch Position Switch (Shift Anticipate Switch)?

 

do you mean the clutch/cruise control cut-out switch? that is very easy to wire in.....mount the switch (should be provisions already there) and then run it parallel with the brake switch....that way if either the brake pedal or the clutch pedal is depressed the cruise control will turn off. you don't want to press the clutch in with the cruise control on and have your RPMs skyrocket been there done that.

 

as far as the clutch start/safety switch, i never even bothered with that thing. i still have it, i don't know why.

[93GTP]

Yea I guess that's what I mean. My service manual calls it the shift anticipate switch but it's just the one that strikes the clutch pedal arm when the pedal isn't pressed. My goal is to wire everything up like an original 5 speed if it isn't too difficult.

 

Clutch Position Switch (Shift Anticipate Switch)?

 

do you mean the clutch/cruise control cut-out switch? that is very easy to wire in.....mount the switch (should be provisions already there) and then run it parallel with the brake switch....that way if either the brake pedal or the clutch pedal is depressed the cruise control will turn off. you don't want to press the clutch in with the cruise control on and have your RPMs skyrocket been there done that.

 

as far as the clutch start/safety switch, i never even bothered with that thing. i still have it, i don't know why.

[sspeedstreet]

My 1992 diagrams show the cruise cut off and the clutch anticipation switch being one and the same. If your wiring harness is for an automatic car, it has a red wire from the TCC solenoid (first gear) to position D22 on the ECM. When you change the auto chip for the 5-speed chip, D22 is now looking for the clutch anticipation signal from the clutch switch.

 

I asked the same question for my Fiero swap and got the same lack of enthusiam over on the 60* board. I figure if GM spent the money to put it there then I'm going to hook it up.

[OldSkoolGP]

THe thing about the switch is we did wire it for mine, and it's good to do because it trips something in the computer. I think it refers to the switch as a load sensor. So when you let out the clutch and the car starts rolling, it automatically gives it gas so you don't stall it. you can drive the car fine without it, but you may get code 39. It's nothing to worry about, and if you look in the GM code index it will say it's for the torque concerter or something. If you're doing the swap, did you also get a 5-speed chip for your computer?

[93GTP]

Okay, so is there a wire in the auto harness that feeds to pin D22 on the ECM? Or will I have to run my own wire to it?

 

My 1992 diagrams show the cruise cut off and the clutch anticipation switch being one and the same. If your wiring harness is for an automatic car, it has a red wire from the TCC solenoid (first gear) to position D22 on the ECM. When you change the auto chip for the 5-speed chip, D22 is now looking for the clutch anticipation signal from the clutch switch.

 

I asked the same question for my Fiero swap and got the same lack of enthusiam over on the 60* board. I figure if GM spent the money to put it there then I'm going to hook it up.

[93GTP]

My plans are to use my original auto ECM and buy a chip from Ben. I do still have the standard ECM in the Z34 but I won't be running the AIR system that it's programmed for. Either way I'll be needing a chip from Ben. According to him it doesn't matter which ECM I use, but I will confirm which one is best to use when the time comes. Because I do want to wire in the two switches for the standard.

 

THe thing about the switch is we did wire it for mine, and it's good to do because it trips something in the computer. I think it refers to the switch as a load sensor. So when you let out the clutch and the car starts rolling, it automatically gives it gas so you don't stall it. you can drive the car fine without it, but you may get code 39. It's nothing to worry about, and if you look in the GM code index it will say it's for the torque concerter or something. If you're doing the swap, did you also get a 5-speed chip for your computer?

[OldSkoolGP]

I did do a write-up on everything you need to do to convert your harness. It entailed everything but the clutch switch because I didn't remember what we did after I wrote the writeup, just that it is not totally necessary to have it. But mine is wired correctly, I can tap the clutch on the freeway and the cruise kicks off, so it is wired in line to the brake cruise switch most likely.

[sspeedstreet]

Okay, so is there a wire in the auto harness that feeds to pin D22 on the ECM? Or will I have to run my own wire to it?

 

My 1992 diagrams show the cruise cut off and the clutch anticipation switch being one and the same. If your wiring harness is for an automatic car, it has a red wire from the TCC solenoid (first gear) to position D22 on the ECM. When you change the auto chip for the 5-speed chip, D22 is now looking for the clutch anticipation signal from the clutch switch.

 

Like I said, your auto harness has a red wire that goes from D22 on the computer to the first gear solenoid. 5-speed, no more auto trans = no more first gear solenoid. With the 5-speed chip, D22 is now looking for clutch information. Run the red wire to the clutch switch.