HELP! SOS had in underhood electric fire August 20, 2009, 07:59:08 AM Break out your thinking caps and wiring schematics for me (88 Thunderbird 5.0). Had an under hood fire just under the starter relay that blew out a fuse link.I've looked at all kinds of mustang 5.0 schematics and just can't figure out what this wire powers. Here is the placement under hood and wire colors.Off the (+) positive side of the starter relay there is a ring terminal that is BLACK with orange stripe that leads to a single fuse link and branches out into 3 DARK BLUE wires each has there own fuse link.2 of the of the blue wires turn into BLACK and orange striped wires after the fuse link and go into the harnessThe 3rd blue wire turns into a YELLOW wire after the fuse link and this is the wire that blew out!! It blew apart in the dark blue section of wiring. What does this wire power? I'm no electrical guru but if I know what the wire powers I can use the schematic to trace back the problem. Thanks in advance for any help Quote Selected
HELP! SOS had in underhood electric fire Reply #2 – August 20, 2009, 08:24:08 AM Got it THANKS!!!!!!!!:D Is the fuel pump relay under the driver seat like a mustang?I changed my fuel pump recently to a Walbro 190. I'm going to drop the tank again and make sure the harness didn't get pinched and pull the pump out and recheck it all. Quote Selected
HELP! SOS had in underhood electric fire Reply #3 – August 20, 2009, 09:22:11 AM Quote from: quick50stng;287286Got it THANKS!!!!!!!!:D Is the fuel pump relay under the driver seat like a mustang?I changed my fuel pump recently to a Walbro 190. I'm going to drop the tank again and make sure the harness didn't get pinched and pull the pump out and recheck it all.My fuel pump relay is located in the trunk on the passenger side fastened to the metal support for the rear seat back. Quote Selected
HELP! SOS had in underhood electric fire Reply #4 – August 22, 2009, 07:17:04 PM So i dropped the tank today to see what the issue is inside the tank. I pulled out the pump assembly and the spade connectors used to connect the pump wires to the harness were resting on the pickup tube:hick: I guess the wire had to much slack because it wasn't like that when I dropped it in. Soldered and used heat shrink and put back together. I'll test it all out tomorrow. I'm sure that's were the wire was grounding out. Quote Selected
HELP! SOS had in underhood electric fire Reply #5 – August 22, 2009, 10:49:32 PM the realy is going to be green if u still need to find it Quote Selected
HELP! SOS had in underhood electric fire Reply #6 – August 22, 2009, 11:15:22 PM thanks i did find the relay Quote Selected
HELP! SOS had in underhood electric fire Reply #7 – August 24, 2009, 11:19:59 PM Quote from: hwy73;287285According to the 88 EVTM, that yellow (circuit 37) powers the Fuel Pump Relay. From your description, it sounds like Fuse Link "O", 20 gauge - blue, burned up.NoCircuit 37 is power passing through the contacts side of the fuel pump relay.the coil side in the fuel pump relay gets its power from the contact side of the EEC relay which is the blue fuse link "L" and its electronically managed ground on the tan light green at the eec pin 22.The EEC relay coil gets power from the ignition switch.there are very few ways to burn out the fuse link you have mentioned that transitions in the yellow wire circuit 37 and one way is for someone to have been jumpering out the fuel pump relay.dont be surprised if when you turn on your key, you dont hear the pump run. Quote Selected
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