I just purchased the 87 about months ago. So I need to know what wire from inside the engine needs to be hot in order for my fuel pump to properly work. I dont have a problem with the pump itself but in stead of being wired correctly it is bypassed now. I want to correct the original problem which is supposibly a fusable link gone bad. Since I do not have access to the fuel pump I only have one side to work from. The engine side. Any suggestions

 

You dont need two threads for the same question, esp not in the same forum



Simplified, it is this:



Ignore the note and the enable pin label, this was for a LS1 pcm swap

 

Do you still have the fuel pump relay socket? It has an orange wire on it, that's the one you need to trace. It travels through the engine harness loom to the fenderwell next to the battery to a single fuse holder. That fuse powers your fuel pump and also the ECM.

That orange wire should be easy to identify in the harness (not many wires like that in the loom), especially since you can probe it with the fuse in and out and see whether the wire has 12V on it or not.

Hope this helps.
Lou