86 S15 Jimmy ECM b fuse keeps blowing
 

Hi,
If anyone can help it would be greatly appreciated. I've seen many posts with this problem and all hav solved it. I've tried everything suggested on every post and nothing has worked. I am not getting any fuel to the TBI and the ECM b fuse blows whenever i turn the power on. I have already replaced the oil pressure sensor, fuel pump, fuel pump relay (I think I have anyway), and the ignition control module. I had the coil checked and that was fine too. Please, I will take any feedback. It's a daily driver so I need it back as soon as possible.

Also, I'm not exactly sure which relay is for the fuel pump. I have 4 on the driver's side.

Another thing is that it is not exactly a Jimmy, it's an S15 Sierra Classic, so there are a few parts here and there that are slightly different. It complicates things for me sometimes.

Re: 86 S15 Jimmy ECM b fuse keeps blowing
 

Had that problem this weekend. The wiring harness from the fuel relay on the drivers side goes to the passenger side into the firewall under the heater and to the ecm. had a wire get grounded out and blow the fuse to the ecm which then leaves no power to the fuel pump relay. check the harness and make sure it is not pinched where it wraps around the tranny bellhousing

Re: 86 S15 Jimmy ECM b fuse keeps blowing
 

alright! finally something that might actually get me somewhere! thanks a lot! i'll look for it tomorrow morning.

Re: 86 S15 Jimmy ECM b fuse keeps blowing
 

I cant remember but I think the pump power is fed from that fuse. i have seen metal clamps on the sender hose slide down shorting across the pump leads.

Re: 86 S15 Jimmy ECM b fuse keeps blowing
 

that's actually what it was. the two terminals to the fuel pump were in contact and were shorting out the fuse. thanks though. hopefully this will help anyone else with the same problem.