4 High / 4 Low Dash Issues

[jonhall]

Ive been putting off fixin a wheel bearing issue for a few weeks...well, my wife told me that recently, the 4 high and 4 low dash lights have been coming on and off randomly. today, i tried out the 4wd, and no lights came on, and this got me thinkin...is it possible that my expy is in awd / 4wd right now and havent realized it, and the "roaring" sound i hear at 55mph+ is the transfer case making sounds? i jacked up the truck, and neither wheel was loose, both very tight. other than going off road, how can i see if its in 4wd or 2wd right now?

 

[K5rnt]

Try pulling fuse 115 that is the one that controls the shift motor.

 

[KC Dave]

Jon, What does the switch say on the dash? Do you have a 2WD setting? Mine has 4 settings:

2WD
A4WD
4 High
4 Low

When in the A4WD setting, the system automatically engages the 4WD system if it senses wheel slipage. Perhaps your bad bearing is causing the ABS sensor to show wheel slipage?

 

[jonhall]

mine has the same 4 settings. when i turn the switch, nothing happens...no dash lights, not sounds from transfer case...nothing.

 

[RyanHall]

So I noticed this weekend my 4x4 high light doesn't turn on either. 4 low comes on just fine. Clunk from shifting into low but no noise whatsoever when switching to 4hi. I too have all 4 settings. Any ideas?

 

[RyanHall]

I should add, when switching from 2wd to awd to 4h, the light turns on for a half second or so.