Engine/Transmission (1994 - 1998) Flickering 4WD lamp

[DieselDoghouse]

With about 140,000 on the clock, my 4WD lamp will light when the transfer case is engaged, but as you drive, if you lift throttle the lamp will flicker and go out, get on the pedal and the lamp relights, this is continually repeatable at road speeds. Have replaced the switch unit thinking the wiper inside might be worn. The vacuum lines seem secure. Anyone run into this? Bad electrical harness?? Too much slap worn into the yoke shaft?? Weak vacuum pump (all other vacuum-serviced servos are working fine) Any advice/experiences appreciated!!

 

[illflem]

loose light bulb?

 

[MLee]

flickering lite

DD;

I had mine do that a while back, i have vacuum control on it for slow maneuvering, and for got to switch back to vac. when i seen this i made the switch back to vac. and every thing is OK.

you might want to check all the tubbing, make sure no leakage, and all good connections. check the diaphragm can on the front axle.



Marv.

 

[y-knot]

A vacume tester will help find the proballem