Gentlemen: Thanks.All good questions. Four years ago my truck would not start, no way, no how. Found out that the wiring harness plug on pass side inner fender had a frayed, rotten wire which supplied power to fuel shut off solenoid. When I replaced this wire I installed a 10 amp in line fuse. Two weeks ago my truck died while out camping. Left me stranded. I noticed right away that the 10amp fuse had blown. Put in another fuse. It blew. After getting the truck home I started checking the connections in and around the pump. If I disconnected the temp switch the truck would start right up, fuse good. If I connected to the switch again, fuse blew, no start. I noted some corrosion on the temp switch plug and cleaned it. The fss is getting power when key is on like it should. The temp switch is getting power when key is on, and the fast idle solenoid is also getting power from the temp switch when it is attached. I connected all three and the truck started. Fast idle worked and came down to normal idle after reaching 122*F just like it should. It may have been the connector who knows. Can anyone tell me what the normal resistance of the temp switch is new so I can check my oem? Would probably save me some work. Does the temp switch either work or not work and do they short themselves out or was the fuse blowing due to bad connection? I put the inline fuse in because it was easy to do and it would help me at a glance to see if I was getting power instead of taking out a test light and fumbling around in the dark. Thanks again.
Brian