i was gonna start a thread and ask why my truck didnt have a 4wd light ,cause i def dont see one when i engauge it. I notice it the other day but i not sure if i comes with one on 04 5.9 auto

 

there is a position switch on the transfercase that is supposed to tell the cluster when it grabs 4x4. I'd imagine if that switch is out of adjustment or broken it wouldn't turn on.

I have the shift on the fly transfercase in my truck and my light in the dash blinks on and off when it wants too while in 4x4

 

Do you know where that is located on the transfer case So I can take a look at it?

Thanks!

 

Look for something with a harness going to it Shouldn't be many things there since yours is a manual version. I'd expect it to be somewhere in the middle of the case and not near the output shaft.

 

I'm in the same boat. Got my '05 a week ago. I guess I need to crawl under again and start poking around with the switch on the transfer case.

 

I think there's only 1 harness on the manual transfer case. I just had mine out last week and that's all it had. It was on the top front driver's side near where the linkage attaches. It's a 2 wire harness.

 

Is it the two wire harness that plugs into the top of the transmission? I took that off and carefully inspected and cleaned it up but the light still does not turn on. What do I have to do to replace this sensor? thanks!

 

The transfer case bolts to the tail end of the transmission, but yes it is a 2 wire harness as shown in the pic below, right behind the transfer case vent tube.

I stole that pic from one of the 48re R&R threads. I hope the OP doesn't mind.

 

I don't think a 4 wheel drive indicator light sender would be on the transmission. The transmission wouldn't know if or when the transfer case is in 4x4.

I suspect, though don't know for sure, that it is a position sensor that may be a pin and detent style where something actually pushes on a pin, or it is a magnetic pickup style where something ferrous based runs in front of it when it is in 4x4 and it is supposed to pick that up.

If it is the magnetic style those type of sensors crap out all the time, they are kinda similar to wheel speed sensors that die all the time on our trucks. If they aren't too much you may just want to swap in a new sensor and see what happens.

 

My 04 did the same thing. Mine turned out to be the wireing harness at the transher case switch had lost its ground. We installed an external ground and that fixed it.

 

There's only one on the T case. It's on the driver's side on the top.

 

Does the manually shifted transfer case not have a dash indicator? I've had this truck for just a few weeks and there is no indication when it's in 4WD. When I test the instrument cluster, the "SERV 4WD" indicator on the VFD and the automatic transmission range indicator are the only two that don't light up.

So is that a fault or is it by design? The service manual says, "A service 4WD indicator is standard equipment on all instrument clusters. However, on vehicles not equipped with the optional four-wheel drive system and electronically shifted transfer case, this indicator is electronically disabled." and I don't have the electronically shifted TC.

 

Does the manually shifted transfer case not have a dash indicator? I've had this truck for just a few weeks and there is no indication when it's in 4WD. When I test the instrument cluster, the "SERV 4WD" indicator on the VFD and the automatic transmission range indicator are the only two that don't light up.

The 4wd light is at the bottom of the Tach...

 

The light should come on.

 

I have an '05 that wouldn't show the 4WD light...

On the transfer case, there is only one 2 wire harness that goes to a ball switch that threads into the case. It was about 45$CAD from the dealer and fixed my issue. Just get under there and remove the harness and spin it out and test it with a multi-meter. Not rocket science.

 

I just bought a 2011 2500 Laramie 4x4, and the light just keeps blinking. The truck goes in four wheel drive, but the lights doesn't stop blinking. I've tried everything with regard to backing up, moving ahead, turning the wheels and moving slightly, but the light still just blinks. I have 3500kms on this truck! I hope it's not something broke already!

 

I have same problem except I'm not getting any vacuum down to the actuator.

 

I'm not getting vacuum to the actuator to move the coupler. I have vacuum up in the engine compartment though approximately 10 inches. Does anybody have an idea?

 

Please take your second gen problem to the second gen part of the forum