FPIS

[R.C. Champagne]

Thread '2004 Ranger Fuel Pump Inertia Switch FPIS'

Yesterday at 11:51 PM

I have had intermittent crank no start issues with my 2004 Ranger 3.0 V6 XLT SuperCab with 100K miles. I am close to figuring out the whole problem. The other day the crank no start happened again and using my knowledge that I have been able to google I found the suspect major contributor. I am uploading photos showing what I found. During my trouble shooting this time, after getting the truck started, I happened to reach up under the dash to check the FPIS after the truck had been running for about 2 minutes and noticed the wires going to the switch were very hot. I'd guess at least 130...

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[pjtoledo]

toasted wires on that switch are very common.
since only the ends of the wires are toasted it's the connection that's getting hot
replacement pigtails are available. do the switch too.
the PCM monitors the voltage at the switch, if it doesn't like what it sees it shuts the power off to the fuel pump.