do not take this the wrong way but replacing a wiring harness is about 100 times harder than replacing the slave cylinder. but i have one it is out of a 84 4runner i will look for it if i find it i will let you know you need to post if the wiring harnesses are the same between 84 and 85. and if you want we can talk $ after i know i have it and it will work on your truck. also the radio wires might have been cut and it will be a main harness for sure smaller harnesses i will have to see. but i will have to find it and make sure it is still here.