digitalepiphany
1/2 ton status
You are circling the wrong things.
I didn't circle anything. That's the image from the link you posted above.
You are circling the wrong things.
Don't ask a person at the parts store, they are almost always clueless. Go to the wiring section and look through the pigtail stuff hanging on the rack. The wrecking yard may be easier though.
Take a look at this link and I think what you are looking for is on the lower right of the page. http://www.picowiring.com/pdf/Cat-14.pdf
I still think you're looking at improving a hack instead of making things right. Maybe you can provide more information. What transmission was stock in the vehicle? Why did your tranny guy do any wiring outside the transmission case? Wasn't there tranny wiring from the factory? Was anything else added to the setup like a speed control or a vacuum switch when this tranny was put in?
You want the brake pedal circuit in place at minimum. Having something tapped right into the fuse block implies all that has been bypassed. Ideally you will have the factory circuit including the vac switch (near the brake booster), the 4WD relay (under dash) and the brake switch (near brake pedal, obviously). It sounds like your tranny guy was too lazy to figure this out or the 700 was swapped in place of something else. There are threads here laying all this out if you search.
Here's the vac switch:
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The wiring is something like this:
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Obviously replacing all of that with a single wire to the fuse block is not the same thing.
Originally, this truck had a 305 and a 700R4. It now has a 400 and a 4L60. I have no idea about any of the factory wiring, speed control, or vacuum switch.
I might just take it to a local transmission shop to have it done right.
Can you get more pics of the brake switches, transmission plug, vacuum switch, etc.?