Ok well here is the deal. Was cruising down the interstate and when i let up so i wouldn't speed the car basically dies. ok well we pull off and the fuel pump aint coming on so we jump it at terminal g and it comes on so suspect relay. relay is fine. ecm is getting power i believe at B2. The 20 amp fuse by the battery on the inner fender popped. so the orange wire i belive has a short. any help on what exactly this wire does as i am getting spark and fuel with it jumped but it wont start. wont flash any codes or anything like that so the ecm isn't getting power or anything to run the injectors right?

sorry if confusing or rambly i havn't slept much lately. any help is greatly apprecieated. check sig for car and mods.

thanks guys

 

Yes, that 20A fuse under the hood (near the battery) serves both the fuel pump and ECM. Look for wire damage, and corrsion at the FP relay and socket.

 

there isn't any corosion or damage there. I was looking at the wiring diagram and it shows that wire splits off to 3 other things, the fuel pump relay, MAF burn off, and fuel pump/oil pressure switch or something like that. What is that last one? It isn't the oil pressure sending unit cause that only has one wire and this is showing that switch has 2 an orange and light blue i believe.

 

Yes, it feeds all those items:



The last item you mentioned is the auxilliary oil pressure switch (shown in the schematic). You should be able to find your's behind the distributor or above the oil filter mount on some later models:

 

Well I did some searching on here and did a few things and got it to work. I disconected the oil psi sending units wire put the 20A fuse back in and it didn't pop, turned the key no pop, started the car and no pop, drove it no pop, got on it no pop. so that would mean my sending unit or that switch is bad?

 

That's a safe bet. You can verify that with an ohmmeter.