My mechanic tried to trace the wire back from the actuator to wherever it is bad, but it ran into a wiring harness with a bunch of other wires and he can't tell where it comes out. This is what it looks like in 4L. Just a better design or are the front diffs different yielding the change in actuators? Make sure you get the electric one. If so, repair open in Brown wire between convenience center and transfer case switch. This sequence continues to flash until the jumper wire is disconnected. If you have this as part of this circuit too, then this should also be checked.
The can be replaced, or just the less expensive can be changed. V8 Four Wheel Drive Automatic 180000 miles. I will try to jump the switch's wire togeather tomorrow night and see if the lights quits flashing. Just seems like the front hubs refuse to lock in. Testing the brown wire resulted in 12v, testing the black wire resulted in 0v, however no ground either. You can put a light bulb in place of the fuse so you will know once it turns off, you found the break.
Test power to transfer case switch. It was not, I though it might be the motor so I already ordered on and had it on hand to swap with the same results, no movement. If you got a scan and now have an idea of what to replace, go to the appropriate section. Check wiring continuity a is best, but you can do some of it with a, verify grounds, and verify power. This is a large 11 x 17 book with around 300 pages. The light on the 4H or the 4L will flash on the button that is pressed. Yeah I am doing better I had an open hernia surgery.
So what do you think. Transfer Case Control Module: This is the system's brain. Now alittle while ago I started the truck and shut it off immediatly and the truck didnt start again. One set of wires went directly to the actuator switch and one set go above it on top of this front transfer case gear box. Fill it through the fill hole until fluid runs out. He thought about running a new wire from the actuator to the switch, but he read somewhere that this could fry my computer.
I was able to install the newer actuator and assumed all was well. I recall you working with this a long time ago Mike. If the button module is damaged, it can command modes you don't want, or fail to command the mode you want. The module could be internally shorted also. I un-plugged the connectors at the actuator I am getting around 13vdc when I press the 4wdh or 4wdl buttons. He has wiring diagrams, but he said they don't agree with what he's found underneath my truck.
The truck has a seperate shifter for the 4x4. It includes the correct adapter harness for trouble free installation! Start there and examine the harness closely looking for anything added or hacked into. I will not be the one testing the actuator. I put it in 4wd last week while I was on a wet slick dirt road at the hunting club. Do you think that it could also be the other switch on the hoghead. I don't know if the ground is a problem on these trucks or not.
At the actuator I am showing a two wire connector, a light blue wire and a black wire. The brown should be 12 volts. Any one know where i can find a wiring diagram for the 4wd system? Cheers, When I press the 4wdh or 4wdL I can hear and feel the transfer shift. Also, don't forget to put the spacer in before you thread the new actuator into the housing or it won't be long enough to engage! The connector has ground in the middle and 12v on the left and right side. My truck is a 2004 Chevy silverado 5. If not, replace transfer case switch. When you put it in four low the unit should turn orange in the front and I am getting nothing.
He put everything together we started it and had no luck. How about four lo, you should definitely hear and feel that shift, as well as the gear reduction, does it continue to flash, or revert back to 2wd. By the way, where did you get your factory manual? I was getting around 6 volts on one and around 8volts on the other one. You might be able to bench test the actuator by applying power and ground to it. On the diff side the plug has 5 wires coming out of it but doesn't have long enough wires to splice into as they were cut by that previous garage I mentioned and the other wires look kinda screwed up as well.