No Electrical Power

[gwrichard Lurker Find all posts View Profile Close gwrichard]

I was in the process of upgrading my head unit in the 2015 Prado GXL. Turns out the kit I received didn't supply the correct wiring harness, so put the factor display back in.

I accidentally plugged the A/C harness into the back of the head unit.

Looks like I blew a fuse, since now the vehicle has no electrical power (no lights, cannot start, etc). The vehicle wasn't turned on at the time, but the battery was connected.

Any ideas on which fuse or fuse link I need to track down?

[GeeWhizz Senior Member Find all posts View Profile Close GeeWhizz]

This could be major or minor, dependinging what circuits were actually involved. I suspect you will need a new head unit, though, since it was the source of the short circuit - time will tell.

Normally, when tracing a failure like this I would trace back from the cause of the failure toward the power source, looking for 12v. However, since you say that everyting has stopped working, I'd trace forward from the battery, looking for a blown fusible link, major fuse or relay.

[gwrichard Lurker Find all posts View Profile Close gwrichard]

Solved.

It ended up being fuse 63, which controls the BODY ECU, meter, heater, steering sensor, wireless remote control, seat position memory, tilt and telescopic steering, multi display, smart entry & start system, folding seat, cool box, DSS#2 ECU, steering switch, D-module switch, overhead module.

A single 10 amp fuse took out the whole vehicle!

The fuse must have only partly blown, since on my initial test with the multi-meter it didn't show up. Second go around, was able to locate it, replace it and the Prado started right up.