1996 tahoe electronic 4x4 switch

[Symba_The_Lyon]

Hey there I haven't been on in what feels like a million years lol but I couldent find the thread I made about my push button not going into 4 hi and it just blinking but would go into for low but also blink so lets start with today I whent to a local junk yard and bought a trsnsfer case control module and it cured the problum of 4hi not working but the damn selector switch it still blinking!!! I'm very mad over it because it is annoying as hell does anyone have any clue on but this damn thing is still blinking? Note I have changed the 4x4 switch, 4x4 actuator,encoder motor, and every thing that is bolted to the trans case pretty much

 

[SunlitComet]

when you hit 4 lo only the 4lo was on steady? what about other modes?when in the 4hi do you know for sure both front wheels were powered?

 

[Symba_The_Lyon]

No il will put it in 4lo it will blink and it will lock into place and ill put it in 4hi and will lock into place also but still blink I know I am geting power in both hi/lo I have a trail on my property and I have to climb over a few good sized trees and I have power to the front tires in both modes also 2wd dosent blink

 

[SunlitComet]

so when 4lo it blinks and then goes to a steady light. is that what you meant by locked in. but 4hi just blinks constantly. correct? yes or no?

 

[SunlitComet]

or do you mean lock into place to mean the tcase actual mode shift.

 

[Symba_The_Lyon]

When selected neather 4x4 mode on the switch the light stays steady the allways flash and when I say they lock in I mean the t case shifting modes

 

[SunlitComet]

then it sounds like the front axle actuator is not locking in place because either it is broken or the switch on the t-case is broken. it also could be that the feed back switch is broken but you would know that if the lights just flashed on and on but both front wheels had power.

get yourself a multi meter.remove the 4wd fuse. set the meter to measure highest amperage. stick the probes on each fuse terminal while that is done engage the 4wd modes. if the t-case switch is working as well as as the circuitry of the actuator. otherwise the amps b=may me temporary or non-existent. if power is steady and good pull the actuator and see if it extends. if so and reinstalled an BOTH front wheels still do not lock to the t-case the the shift fork in the diffy is likely broken.

 

[Symba_The_Lyon]

Is there a shif fork on the tcase with electric push button?

 

[Symba_The_Lyon]

Or are you talking abought the electronic 4x4 actuator

 

[SunlitComet]

yes the shifting fork system inside is all the same except the 4wd auto nv246 which has an added clutch pack as well. the only difference on the out side is the push buttons have a electric shift motor and the floor shifter system just has a rod linkage shifter on it instead.