Rat ate my wiring

I believe that branch there is only to the windshield wiper motor. If that's all the rat ate (considerate rat!) you have lucked out ...

... except that you had better look into the high coolant temp warning as a likely separate problem, because rat-eaten wiper wires will not have caused that.

 

I have that all unplugged for my engine change I'm going to have to splice all that together unless you're going to change the whole harness out. I wouldn't want to do that.

 

Looks like the rat was considerate enough to only eat a branch of the harness containing the four wires that go to the wiper motor.

Splice four wires, or replace $4097.46 engine bay wiring harness ... decisions, decisions ....

 

Buy an Amp plug assy. And pin tool have here on desk here in shop in 2 4 8 12 wire versions left over from rewiring a Mercedes 190 sl coupe like 57 model .years ago like 89. Good luck

 

If there is enough slack to just lose the half inch or so in length, a Toyota-esque repair would be with parallel splice barrels and sealant-lined heat-shrink sleeves as described here.

Toyota doesn't seem bullish on the more-commonly-available butt splice barrels, but those could be an option if the parallel splices would shorten the wiring too much. Still with the gooped heat-shrink, of course.

You might also consider wrapping some of your wiring in rodent tape.