</font><blockquote><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><hr /><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">Originally posted by YourMom:
<strong>I think this is the solution. The red is how it is hooked up now and the blue is how I propose to hook it up. The LED will only get power when the diff lock switch is engaged and won't illuminate until the diff lock detection switch closes completing the circuit to ground.

<img src="http://home.off-road.com/~kemanuel/forum/WTF2_thumb.jpg" alt="" />

Click here for a larger, more readable picture.</strong></font><hr /></blockquote><font size="2" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">I am not 100% sure what to make of the J7 Junction Connector because my '86 wiring diagram doesn't use this type of symbol. But I assume that it is showing that all 4 wires tie together at this point.

Regardless, it does not appear that RLP pulses the motor. I am not sure what it does, but it sounds like it serves a role in blinking the LED and perhaps allowing the Diff Lock ECU to detect when the Diff is locked (however if the limit switch has been reached, I don't see why the Diff Lock ECU would care).

I would guess that the RLP probably alternates either between 0v and ground (blinking the LED while the Lock Detect Sw is open) or between +12v and gnd (both blinking the LED and allowing the Diff Lock ECU to detect when the Lock Detect Sw closes). I would guess that the ABS ECU is looking for a constant ground so that it knows when the locker is locked.

Your second diagram (blue) looks fine to me, with the exception that I'd hook the LED to a constant +12v power source rather than behind the Control Switch. It will work either way, but hooking it to constant 12v will allow the LED to function independently of the Lock Control Switch. This is how the Factory diagram shows it wired. For example, if you turned off the Lock Control Switch, but the locker didn't disengage for some reason, you'd still want the LED to remain lit so you would know that it was still locked.