lq4powereds13

iTrader: (7)

Started on my wire harness tonight and have a few wires left from the C2 underhood fusebox plug that I'm having a hard time figuring out what they need to go to. All five go to the neutral safety switch but not sure what i need to hook them up to. It is a 2001 6.0l harness. I've searched but no luck. Thanks for any input.

C2 plug - Wire color - Description

F11 - yellow - Transmission mounted neutral safety switch output

F9 - pink - fused ignition positive voltage

E3 - light green - Transmission mounted neutral safety switch output-park

F10 - purple/white - starter relay feed- coil

Also on this same plug their is a pink wire that goes from pin F2 to the C100 pin C. Is this just a jumper or what? Doesn't look like it goes to anything.

Docked Wage

Are these wires going to the big switch assembly that is mounted on the gear selector shaft of the trans?

99VetteFRC

I used a '03 DBW harness and I just removed all the trans wires as I used a 700r4. I have the truck harness schematics if you need them. Shoot me a PM with your email and I will send them to you.

lq4powereds13

iTrader: (7)

Yup thats it, has two connectors on it. Those wires are all in one connector and all i have left to hookup.

Docked Wage

4L80 or 4L60E?

lq4powereds13

iTrader: (7)

4l80e

Docked Wage

Here's the schematic that shows the wires going to the PCM pins.

Are you using the PCM to control the starter or are you using the transplanted vehicle start circuit? If it's the later and there is already a neutral start switch on the shifter then you can delete the switch assembly on the trans shift shaft. If you do this then the PCM needs to be programmed accordingly.

lq4powereds13

iTrader: (7)

Using the 240's start circuit to control the starter and im using a c5 automatic shifter so I'm not sure if it has one on it or not.

Jeff Smith

iTrader: (44)

I have one 4L80E transmission. The connector goes to next the shift linkage.
Thanks inform.

Docked Wage

The C5 shifter likely does not have a built in switch because it used the same switch (on a 4l60e) that you are dealing with for shifter position info.

At the shift shaft switch check with a multimeter while shifting to verify which two wires have continuity when in neutral and park. That's the PNP portion of the switch.

Run the ignition switch wire that's 12v+ in the crank position through the two wires and then on to the starter.

Docked Wage

Here's the pinouts of the PRND switch.

BTW...You will need to set the PRND in the PCM tune to off if you do not run all of the wires back to the PCM.

lq4powereds13

iTrader: (7)

All of the wires in the c-1 image above still go to the pcm. B,C,E, and G on that second 7 pin connector are the ones that I'm having trouble finding what i need to hook the wire up to.

rmvlt1100

iTrader: (1)

LQ4, I don't want to jump on your post but I am having the same issue with my trans wires. The only difference is that I only have 1 connector to my trans switch. So I hope you don't mind me checking in to see what info that you may get. Good luck with your build. And thanks in advance for the info.
Robert

Docked Wage

Sorry to just hand you off but scrounge around in here for the starting schematic for your donor vehicle:

https://ls1tech.com/forums/conversio...-diagrams.html

lq4powereds13

iTrader: (7)

Well i sent Brendan(runs lt1swap.com) a email and he sent me this, which pretty much answers my question. Looks like i will just use the ones for the reverse light switch and remove/clip the others.

They all come out. Those wires COULD be used for a reverse light switch, or to wire up a safety switch to disable the starter in ranges other then park or neutral.

-Brendan.

There are only 4 wires from the switch that go to the computer, and these should be kept. (these will be the 4 on the smaller of the two plugs for the range sensor)

-Brendan.