brake switch?

[mooseknuckles]

has anyone got any info or diagrams on how to wire the 4-pin brake switch up?

[clinebarger]

If you need to know what pin on the PCM....I need to know what year PCM your using.

[mooseknuckles]

my harness has a purple (brake signal tcc ground) wire thats supposed to go to a 12v (brakes not applied)?

[clinebarger]

Hook the purple wire to the "to PCM" terminal of the brake switch.

[mooseknuckles]

thanks....that seems simple enough......lol..do you have a part # for the switch?

[TopFuel1966]

http://www.summitracing.com/parts/PRF-80176/

[clinebarger]

AC Delco part# D862C

[mooseknuckles]

Originally Posted by clinebarger

If you need to know what pin on the PCM....I need to know what year PCM your using.

my truck already has a 4 pin switch, but I changed it to the new one anyway...it already has four wires hooked up to it, so do I just tie into that last wire?

[clinebarger]

Originally Posted by mooseknuckles

my truck already has a 4 pin switch, but I changed it to the new one anyway...it already has four wires hooked up to it, so do I just tie into that last wire?

I dont know what year truck you have...
The Pink wire will be the Ignition Hot...Leave it alone, Cut & splice onto the other wire. The polarity doesnt matter.

[mooseknuckles]

Originally Posted by clinebarger

i dont know what year truck you have...
The pink wire will be the ignition hot...leave it alone, cut & splice onto the other wire. The polarity doesnt matter.

86

[mooseknuckles]

mine has a light blue and brown wire....

[flamingbig10]

oh no I tcc wires backwards

[mooseknuckles]

thanks!....

[usmcchevy]

Originally Posted by flamingbig10

oh no I tcc wires backwards

[mooseknuckles]

another question.....I have a orange wire for park/neutral, it says to ground (in park/neutral)....where does that go??

[ls1nova71]

Originally Posted by mooseknuckles

another question.....I have a orange wire for park/neutral, it says to ground (in park/neutral)....where does that go??

This is why it's easier to leave the range sensor on the side of the transmission, it has switches that go to ground in park and neutral, and the NSS in older cars don't multi-task very well. But since you don't have it, and your harness is set up like an F-body LS1, you'll either have to just permanetly ground it (not the best option, but people do it), or put some kind of micro switches that will close in both ground and park, with one side wired to ground and the other side going to your PCM. Or, you could get away with using only one in the park position. Or, if you're feeling really ambitious, you can do this. http://ls1tech.com/forums/conversion...-question.html It works just like factory with only the original NSS.

Edit: as I was posting this, I remembered your truck isn't a 67-72. Some of the later trucks have a mechanical neutral safety switch, meaning that the key won't physically turn in any gear but park and neutral, it doesn't cut the electrical power to the starter solenoid. If this is how your column is, it will have a switch on the column, 2 wires will be for the back up lights, if it has another set, you could use them for your park/neutral switch. You'll have to check to be sure that they work that way on your year of truck, but I know that S-10's from at least '87-'94 are this way.

[mooseknuckles]

Originally Posted by ls1nova71

This is why it's easier to leave the range sensor on the side of the transmission, it has switches that go to ground in park and neutral, and the NSS in older cars don't multi-task very well. But since you don't have it, and your harness is set up like an F-body LS1, you'll either have to just permanetly ground it (not the best option, but people do it), or put some kind of micro switches that will close in both ground and park, with one side wired to ground and the other side going to your PCM. Or, you could get away with using only one in the park position. Or, if you're feeling really ambitious, you can do this. http://ls1tech.com/forums/conversion...-question.html It works just like factory with only the original NSS.

Edit: as I was posting this, I remembered your truck isn't a 67-72. Some of the later trucks have a mechanical neutral safety switch, meaning that the key won't physically turn in any gear but park and neutral, it doesn't cut the electrical power to the starter solenoid. If this is how your column is, it will have a switch on the column, 2 wires will be for the back up lights, if it has another set, you could use them for your park/neutral switch. You'll have to check to be sure that they work that way on your year of truck, but I know that S-10's from at least '87-'94 are this way.

thanks....yeah mine has a neutral saftey switch on the colum...I never really looked at it that close to see where i can hook it up...just want to be sure...

[softballnrd27]

Do I need the TCC brake signal for a th350 w/ a non-lockup converter?