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Looking for short in 22RE wiring

791 views 3 replies 3 participants last post by  PROJECTJUNKIE 
#1 ·
I need some help understanding how to go about looking for a short in the wiring harness. What I have is a 91 Toyota truck with a 22re and the EFI fuse blows as soon as I try to start it. I posted in the Toyota forum and the response where to check the O2 sensor for melted wires. Unfortinataley no melted wires. I guess the only thing now is to start looking for the short and I am hoping someone can tell me a logical way to begin tracking down the problem.

Thanks, Steve
 
#4 · (Edited)
Put a light bulb in the fuse socket, either a newer domestic 3357? type with the wires pulled down and stuffed in the socket, or a bulb/socket/male spades in the socket, the bulb will light as long as fused side is shorted. Start unplugging harnesses that are EFI related and you will isolate the short once the bulb goes out. Don't forget to reconnect your connectors.
 
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