Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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this may be because of a bad 4wd/differential sensor located on the front differential..
the sensor may not be grounded well or,the sensor itself is just bad
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i see,,,sense it did in fact work with the old actuator,,i would think the problem is this actuator,,it just doesnt have as good a grond signal for the light as your old one..
there may not be a fix other than trying another actuator
if it doesnt have the sensor,,the actuator is the only thing that gives it the signal...and,it worked with your old one
1. Check for power on the Brown wire, at the switch on top of the Transfer Case, with the key on.2. Check the 4WD fuse for being blown. With the Transfer Case in 4WD, check for power on the Blue wire, backprobed at the switch on the Transfer Case.3. Disconnect the actuator in front, with it in 4WD, and see if it has power and ground on the Blue and Black wire.
Tech Tips:Power is supplied on the Brown wire to the switch, and when put in 4WD, the switch on the Transfer Case closes and puts power out on the Blue wire to the Actuator in the front. The Actuator is always grounded, so when it gets power on the Blue wire, it should activate to lock the front end.
Your truck is the year model that they changed factory had a tsb which involved adding an extra wire, was that done to yours and was it done properly
How about thr pin in the connector and thr wire is it good