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gmtech4, Chevy Mechanic
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Experience:  14 yrs GM experience ,
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1991 chevy: z71..transfer case engages but the lights..shifter

Customer Question

i have a 1991 chevy z71 and the four wheel drive isnt working. the transfer case engages but the lights on the shifter cover dont come on. what could it be?
Submitted: 7 years ago.
Category: Chevy
Expert:  gmtech4 replied 7 years ago.
there are 2 conectors at the frt diff,1 goes to the actuator and the other to the little switch that lights up the indicator beside the t case shifter ,remove the actuator and connect it to the connector,key on,put it in 4wd ,actuator should extend ,chk for power if does not extend, replace th actuator if it does not extend with power to it ,if no power look on top of t case for the switch that gets activated when put in 4wd,that switch powers up the frt diff actuator,check for power to that switch ,power should go in & out when in 4wd ,replace this switch if it does not put power thru to the frt diff actuator,good luck,your GM tech -Rob-

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