Gremlin in 4x4

[jbsaxman]

I've got an electrical gremlin in my 4WD...bought a new actuator to 'fix' it, plugged it in without installing it and it didn't engage. Unless I did it wrong. I even started the truck and put it in 4WD, it did not engage.

Does anyone have a schematic of the 4WD electrical they can post for me?

 

[minisub]

2 wires on the actuator or 3?

 

[jbsaxman]

2 wires on the actuator or 3?

Looks like 3.

 

[jbsaxman]

Anyone? I at least need to know what wire does what so I can put in a manual switch to engage the front differential.

 

[jrsavoie]

The switches themselves are known to go out. Did you check power to the encoder motor plug?

 

[jbsaxman]

I have no idea where that is.

ETA: where is the switch at? on the transfer case itself?

Also, I traced the lines from the diff harness to a relay on the firewall. From there, I don't know what is what.

 

[jbsaxman]

I should also mention that the 4x4 lights have never worked as long as I've owned the truck. Not sure how relevant it is.

 

[jrsavoie]

Do you have push button 4 wheel drive on the dash? If so that is the switch I am talking about. I've had to replace 4 of them. The switch has 3 or 4 buttons. 2 Hi, 4 hi, 4 low & possibly auto.

 

[Matt Bachand]

I should also mention that the 4x4 lights have never worked as long as I've owned the truck. Not sure how relevant it is.

For what its worth, when I pull my lever back into 4x4, I need to slow down to a near stop before I can hear and feel my 4x4 engange. I hear a few slow teeth movement then clunk, it enganges.

THEN, and ONLY THEN, do my 4x4 lights come on.

 

[jbsaxman]

Well, after rolling around in the snow underneath my rig for a while I found where a butt splice was pulled out. I'm getting it put back together, but wiring it to a switch rather than the xfer case. That should work. I threw a multimeter on it and only got power when it was in 4x4. I just got the hard part done underneath the truck. I just need to fish the wires up into the truck and connect them to the switch I bought.

 

[jbsaxman]

Good news. I now have 4WD, with a switch activated diff locker. Works like a champ.

 

[deejaaa]

Good news. I now have 4WD, with a switch activated diff locker. Works like a champ.

glad to hear it. enjoying the IP?