[RylanO’s s10zr2]

Hey everyone! I started towing larger trailers with my 2002 s10 zr2. It doesn’t have the tow package but someone put a class 3 receiver hitch on it. So i wired In a 7 pin connector . But I was unable to find the brake pedal signal wire for the input to the controller. I have everything else wired in, but can’t find the wire that activates the trailers brakes when I push the break pedal on the truck. Any help would be appreciated.

 

[Recklessabandon]

There are two wires at your brake switch, a brown and a purple. You want to use the purple one as the signal for you controller.

 

[RylanO’s s10zr2]

There are two wires at your brake switch, a brown and a purple. You want to use the purple one as the signal for you controller.

Thanks, where does the purple wire run to? I’d like to get to it without ripping out my dash.

 

[Recklessabandon]

You can get to it easily without pulling your dash. If you look kind of high on the brake pedal, you'll see the switch with the two wires going to it.

 

[Recklessabandon]

Number 2 Is the switch you're looking for.

 

[RylanO’s s10zr2]

View attachment 361196
Number 2 Is the switch you're looking for.

Thank you so much! I’ll have to see if I can find the switch.

 

[manbearpig]

There should be a white wire back there already for the trailer chmsl, can't you just use that?

 

[Recklessabandon]

There's a light blue one that comes out of the fuse box under the hood, but I doubt it would be easier than the brake switch but it would be on it's own fuse then. But yes the white one should also work. You can see it in this diagram.

 

[manbearpig]

It is light blue. Memory failing me.

 

[Recklessabandon]

It is light blue. Memory failing me.

It's white at the switch but light blue after the fuse box

 

[manbearpig]

It's light blue at the tail light harness. Way easier to use it there than wire from the brake switch. I used it to separate my brake and turn signal wires.

 

[aitch]

Light blue it is. The end of it is in the driver side rear wire harness, around the spare tire. I used mine ('03 Sonoma) for the high center brake light on my topper. It has it's own fuse in the engine compartment fuse box.

 

[Recklessabandon]

All that is true but I think he's looking for the wire for his brake controller under his dash not the brake wire
at the trailer hitch.

 

[RylanO’s s10zr2]

All that is true but I think he's looking for the wire for his brake controller under his dash not the brake wire
at the trailer hitch.

Thank you, I found the wire and now everything works perfectly!

 

[Recklessabandon]

Great!