4wd lights

[CDNTAHOE]

Hey guys was wondering are all the lights on the cluster for the auto, 2hi , 4hi and 4lo suppose to light up before you start the vehicle. Reason for the question is after I cleaned the grounds the 2 hi and neutral light comes on but not the others.I can here the encoder activating but there is no blinking of the 4 hi light or illumination . So I am confused is it in 4 hi or not just really confused what the cause is or what direction to repair it.

 

[Fless]

In my experience the mode light indicators do come on for a second or so when the key is initially switched to the run position (similar to the other cluster indicator lights). There is an LED for each mode of the switch. There is also other backlighting (incandescent from the factory) when the headlights are on.

Generally, the mode lights don't blink, and only one is on at a time.

A Tech 2 scanner can determine what mode is commanded and what the switch should be indicating.

 

[CDNTAHOE]

Are the tech 2 something a person can buy. I am tying to figure out if my 4 wheel drive system is working or is it the lights or switch or encoder. Thanks Fless

 

[CDNTAHOE]

Weird now it works, possible TCCM ? switch ?

 

[SnowDrifter]

I had some luck on mine popping the thing apart then running a soldering iron over where the pins secure to the board. Basically re flow them. Not sure if it'll solve your issue, but I'd file that one under the first pass "check connections" category. Check pin tension too. There are also some grounds for the thing just under your driver's door on an outboard flange on the frame. Remove, clean, grease, reinstall

 

[CDNTAHOE]

Did clean the connections and frame and seems to be ok .All lights come on at start up then settles on the 2 hi. Would spraying some rubber coating to help keep water out cause that is what I did.

 

[SnowDrifter]

I don't care for the rubber coating for this application. More likely to trap moisture than keep it out. Some dielectric grease will do ya

 

[CDNTAHOE]

Cool