Having a rear locking diff that only worked in low range bothered me. I figured that the 7 pin modification could work on the CDL, so why can't we bypass the rear? So a little time in the service manual, and this is what I came up with. Fiddling around for about 1-1/2 hours, locating a nice hidden route for the wire, and cutting the plate for the switch, and one trip to the hardware store for about $7 gave me this setup.
The rear locker is controlled by the "4WD control unit" which is located on the firewall behind the blower motor.
Unclip it frm the bracket & pull it down with the harness.
Locate the black with blue tracer wire in the #7 location (figure that one) and install a Scotch-lock or splice connector.
By putting 12v to this, your giving a false signal that it's in low range, and the rear will lock with the switch. Being locked in high could be useful in the snow and mud without having TRACS, and a little less torque than low range.
Next I purchased a simple rocker switch and ran a 16 gauge wire from the splice to the dash switch area.
I then ran wire from the fuse area to the rocker switch from a 12v source. By leaving the switch off the rear locker remains stock. Turn the switch on to use in high range. The ABS lamp will come on signaling that the ABS is off in low range. I was lucky enough to find a decent size rocker that fit ok with a little cutting.
I just thought some of you might want to utilize that E-locker a little more. And with the 7-pin CDL mod, the rear will work independently on it's own.
The rear locker is controlled by the "4WD control unit" which is located on the firewall behind the blower motor.
Unclip it frm the bracket & pull it down with the harness.
Locate the black with blue tracer wire in the #7 location (figure that one) and install a Scotch-lock or splice connector.
By putting 12v to this, your giving a false signal that it's in low range, and the rear will lock with the switch. Being locked in high could be useful in the snow and mud without having TRACS, and a little less torque than low range.
Next I purchased a simple rocker switch and ran a 16 gauge wire from the splice to the dash switch area.
I then ran wire from the fuse area to the rocker switch from a 12v source. By leaving the switch off the rear locker remains stock. Turn the switch on to use in high range. The ABS lamp will come on signaling that the ABS is off in low range. I was lucky enough to find a decent size rocker that fit ok with a little cutting.
I just thought some of you might want to utilize that E-locker a little more. And with the 7-pin CDL mod, the rear will work independently on it's own.