20 Most Recent 2001 Ford Explorer Sport Trac - Page 8 Questions & Answers

You will need a multi-meter . you will need to check the connections as you push each button to see if the signal is going through the switch.I have seen a few of these and they all were different, one was a switch and then a transfer actuator and the last was a module.You are on the right track, do you hear the transfer case engage when switching? is the transfer case engaging the front driveshaft but front wheels do not lock?

The check engine light gets power from the PCM - there is a PCM relay that gets power from a 10amp fuse number 6 and a 30amp fuse number 10 in the fuse box next to the battery. This can also affect the coil.

IT MEANS THERE IS A CIRCUIT ON YOUR IDEL AIR CONTROL VALVE THREE THINGS THAT COULD BE ONE ITS DISCONECTED OR ITS A BAD IDLE AIR CONTROL VALVE AND THREE THERE COULD BE A SHORT ON THE WIREING HARNESS OK HOPE THIS HELPS NEED MORE HELP LET ME KNOW THATS WHAT CODE P1504 MEANS

A poor connection to the battery can melt a cable. Make sure your battery terminal is clean and free from corrosion.Make sure that your battery lead has slack and that it is not taught, especially when the engine is revving.Make sure you don't over-tighten the soft battery terminal as it will over stress.

Pull out the dash instrument cluster and check any bulbs on the back of the cluster panel.

try reversing slowly a few yards after you take it out of low

Yes it is likely a broken catalytic ceramic brick.