wiring help
Thread Starter
Teching In
Joined: Jan 2013
Posts: 39
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From: Detroit,MI
wiring help Looking for some help doing a swap I have a 2005 6.0 with 4L80E out of a truck. I have picked the harness and have it mostly put back together. I have 3 pink wires coming from trans I believe need key on pwr. then A light green (park neutral position switch) then a dark green ( park neutral start switch) not sure how these get wired.
When you say you have 3 pink wires coming from the transmission, do you mean the range sensor on the side by the shift linkage or the round plug? The range sensor wires are for the starter relay, shift interlock and back up lights. You shouldn't need the light green one in pin 9 because that's the shift interlock wire. Pin 11, pink is power for both the shift interlock and back up lights, pin 10 gray is the output wire to the back up lights. Pin 12 pink is the power to the starter relay and pin 1 dark green is the output wire to the starter relay.
There is also a pink wire that powers up the transmission shift solenoids but that is in the round plug in the side of the transmission.
There is also a pink wire that powers up the transmission shift solenoids but that is in the round plug in the side of the transmission.
Yes, the pink wires are hot with the ignition on. As for the starter relay, you cant run the power to the starter solenoid directly through the range sensor. Are you using it as a neutral safety switch, or is there one on your column you are using? What is this going into?
Thread Starter
Teching In
Joined: Jan 2013
Posts: 39
Likes: 0
From: Detroit,MI
It's in my 50 Chevy car, I am getting an Ididit column. yes I would like to use it as my neutral safety switch, any reason I shouldn't? so how would it get wired? The light green shift interlock what is it for? What is your thoughts on the pink wires put them all together on one fuse or separate them? Thanks I appreciate your time
No reason not to use the range sensor as the neutral safety switch, I actually prefer it to column mounted ones as its more precise since there's no slop in linkage to deal with. I actually misspoke about the pink wires being ignition hot. The one in the round connector is an ignition hot wire and the back up lights/shift interlock is too, but the other one to the starter relay is only hot when the key is in the crank position. To wire it you would take the wire coming from the ignition switch that originally went to the starter and hook it to the pink wire in pin 12, then hook the dark green wire in pin 1 to the 86 position on the relay. Then ground the 85 pin. Pin 87 will need constant power and pin 30 will go to the starter solenoid. Here's a crude drawing to help. 
The shift interlock is what keeps you from being able to shift out of park without your foot on the brake. Its not really useable unless youre using a column that has it already since its hard to retrofit.
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Thread Starter
Teching In
Joined: Jan 2013
Posts: 39
Likes: 0
From: Detroit,MI
Thanks, the interlock wire does nothing in my case right? it don't get connected to anything? The gray backup wire will power up reverse lights? I'm mounting my PCM under the front seat and thought about mounting TAC module under seat also. not a lot of room under dash and I want to run a vintage air unit. Do you think there would be an issue with lengthening the harness that go's from gas pedal to TAC module? Love the wagon build that what I want to do next.
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