t-5 swap electrical question
Thread Starter
Junior Member
Joined: Nov 2006
Posts: 44
Likes: 0
From: La Crescenta
Car: 89 IROC-Z
Engine: 383 stroker
Transmission: WC T-5
Axle/Gears: 2.77
t-5 swap electrical question
I'm trying to hook up my clutch switch that is replaceing the old park sensor on the auto, but there are several pair of yellow and purple wires under my dash. How do identify which ones I need to splice into the new clutch sensor?
Joined: Sep 2005
Posts: 27,915
Likes: 2,447
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
No "splice" should be required. Or any other form of hacking on the wiring, either.
Look in the vicinity of the bottom of the steering column. Find a plug that has nothing in it but 2 big fat wires, one yellow and one purple. Unplug it from whatever it's plugged into. Plug it into the clutch switch. Done. If you find one plug with the 2 wires plugged into another harness that has 2 similar wires, then unplug them from each other, and plug the one into the clutch switch that fits it, and leave the other alone.
Look in the vicinity of the bottom of the steering column. Find a plug that has nothing in it but 2 big fat wires, one yellow and one purple. Unplug it from whatever it's plugged into. Plug it into the clutch switch. Done. If you find one plug with the 2 wires plugged into another harness that has 2 similar wires, then unplug them from each other, and plug the one into the clutch switch that fits it, and leave the other alone.
The three wires going into your automatic are for the torque converter lockup solenoid, which you won't need any longer with a manual trans. You can either cut off that portion of the wiring harness or just tuck it up out of the way. I know some people will disagree with me on this, but I don't believe in having a clutch neutral safety switch anyways. Only a complete idiot would try to start the car while it's in gear without pushing the clutch in first. All I did was splice the yellow and purple wires together, which completely bypasses the neutral safety crap. If you do want the neutral safety to work properly, just splice the correct plug on the yellow and purple wires, then plug it into the switch on the clutch pedal.
Trending Topics
Joined: Sep 2005
Posts: 27,915
Likes: 2,447
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Right.
No that is not a "no, I don't know"; that is a "no, you don't need to cut, splice, or otherwise HACK on ANYTHING".
They perform auto-trans-specific functions, and therefore aren't needed.
Why not just tuck them back in to the harness, so that the car could still have an auto put back in it if that comes to be desired someday (by you or by the next owner)?
As far as splicing the yellow and purple wires together, you can accomplish that in a sanitary manner, again, WITHOUT HACKING, by crimping 2 male slide terminals onto a piece of wire about 3" long, and plugging that into the plug. HACK-FREE. Reversible.
I always recommend doing things to wiring in such a way that nothing is permanently damaged or destroyed. You just never know when you might need to put it back like it was (unless your ability to predict the future is better than mine... I bought a crystal ball recently, as you know you can get just about anything on eBay, but it hasn't seemed to help me...), and hacked-up wiring is about 10 times harder to troubleshoot than unmolested factory wiring that matches the prints. Yet another "look into the future" kind of thing. How'd you like to be sitting in a parking lot somewhere late at night with your date, and your car won't start because your wiring hack came unhacked??
DON'T HACK.
Instead, plug.
No that is not a "no, I don't know"; that is a "no, you don't need to cut, splice, or otherwise HACK on ANYTHING".
They perform auto-trans-specific functions, and therefore aren't needed.
Why not just tuck them back in to the harness, so that the car could still have an auto put back in it if that comes to be desired someday (by you or by the next owner)?
As far as splicing the yellow and purple wires together, you can accomplish that in a sanitary manner, again, WITHOUT HACKING, by crimping 2 male slide terminals onto a piece of wire about 3" long, and plugging that into the plug. HACK-FREE. Reversible.
I always recommend doing things to wiring in such a way that nothing is permanently damaged or destroyed. You just never know when you might need to put it back like it was (unless your ability to predict the future is better than mine... I bought a crystal ball recently, as you know you can get just about anything on eBay, but it hasn't seemed to help me...), and hacked-up wiring is about 10 times harder to troubleshoot than unmolested factory wiring that matches the prints. Yet another "look into the future" kind of thing. How'd you like to be sitting in a parking lot somewhere late at night with your date, and your car won't start because your wiring hack came unhacked??
DON'T HACK.
Instead, plug. Thread Starter
Junior Member
Joined: Nov 2006
Posts: 44
Likes: 0
From: La Crescenta
Car: 89 IROC-Z
Engine: 383 stroker
Transmission: WC T-5
Axle/Gears: 2.77
I definitely see the wisdom in the non-hack approach. My current problem is there are no yellow and purple wires to be found under my dash. I cant tell for sure, but I'm not totally convinced this is the original wire harness from the factory, or hasn’t seen any major re-work from the previous 3 owners.
Besides color (because that option has failed) is there any other way to identify the neutral switch wires? There are 5 wires going into a plug that used to connect to the auto shifter. Two of these wires are a larger gauge than the other three. Are these the appropriate wires to either splice into the clutch switch or cap together? Thanks for the help.
Besides color (because that option has failed) is there any other way to identify the neutral switch wires? There are 5 wires going into a plug that used to connect to the auto shifter. Two of these wires are a larger gauge than the other three. Are these the appropriate wires to either splice into the clutch switch or cap together? Thanks for the help.
Supreme Member
iTrader: (1)
Joined: Feb 2000
Posts: 7,964
Likes: 4
From: Norfolk, VA. USA
Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Maybe Camaros are different, or they changed things later on, but on my 88 Formula, there was a 2 wire connector for the clutch switch already sitting up near the kick panel.
all I did was take the switch from the doner car and plug it in.
Now, there are two wires you do need to splice into in the shifter area and that is the reverse light wires. I can't remember the colors, but you will need the connector and wires going from the trans up to the shifter area, then splice into the wires for the reverse lights.
all I did was take the switch from the doner car and plug it in.
Now, there are two wires you do need to splice into in the shifter area and that is the reverse light wires. I can't remember the colors, but you will need the connector and wires going from the trans up to the shifter area, then splice into the wires for the reverse lights.
The two heaviest gauge wires should be the ones. They're usually 8-10 gauge wires on every car I've messed with. Then like Zepher said, you'll want to take the two wires for the reverse lights out of the same plug and wire them into the reverse light switch on your manual trans.
Thread
Thread Starter
Forum
Replies
Last Post






