96 F-150 4.9L 2WD

My "Low Range" light has been flickering on and off on my truck.

I looked at the wiring diagrams and I pulled the instrument cluster. It appears that the light is a switched ground (ie needs a ground to illuminate). It appears that pin 11 on the instrument cluster harness grounds the Low Range light. The wiring under the dash looks good. I don't see any chafing of the wiring.

At this point, I am stuck. I traced the wire to the giant connector in the firewall and from there it goes into the giant wire bundle. Before, I take the bundle apart, can someone with a 4WD truck help me identify where the wire might go?

Where's the wire harness that plugs into the transfer case? Does it run down the passenger or driver's side frame rail? Any pictures of what I ought to be looking for?

Any ideas? I would just take the bulb out or put electrical tape over it, but I'm concerned that the wiring harness is deteriorating and who knows what other wires might be messed up.

Thanks!

 

Should be a 2 wire plug coming from I think the transmission harness. That plug is used for manual shift transfer cases and is present even on my truck that came from the factory with the JUNK electrically shifted 4x4.

I know that 2 wire plug is wired to the lights cause I plugged it into my manual case that I swapped in after removing the electric junk version.

I doubt you have it, but you can also look for the harness that the electric case uses. It comes thru it's own grommet in the floorboard near the transmission if I remember right, and runs over to the passenger side of the truck to where the electronic controller would be, which is behind the trim panel by the passenger's feet, near the fuel cutout switch.

 

I just wanted to update that I figured it out. I forgot to get photos. Sorry.

The wiring harness for the Low Range light had broken off its mount and it had wedged itself (somehow) between the shock mounting bolt and the underside of the splash guard (aka fender liner). The threaded part of the shock mount had chafed off the insulation and it was grounding out there.

For the curious, the harness is attached to a metal bracket that also holds a second smaller harness. The connectors are attached to this metal bracket and the bracket itself is attached to the fender liner with one of those white plastic push screws.

The attachment point is a hole in the fender liner directly underneath the master cylinder.

 

Thanks for the feedback!