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"Service 4WD"


jas45
06-29-2006, 03:46 PM
Hi, own a 99 Jimmy. My "Service 4WD" light came on yesterday. I have no indicator light lit for selector, normally lit for 2 hi.
Swapped friends working dash selector switch with no change. Checked fuses and all OK. Any help? Thanks in advance.

MT-2500
07-01-2006, 05:49 PM
Hi, own a 99 Jimmy. My "Service 4WD" light came on yesterday. I have no indicator light lit for selector, normally lit for 2 hi.
Swapped friends working dash selector switch with no change. Checked fuses and all OK. Any help? Thanks in advance.

What engine and transfer case?
I would have another look at all fuses.
If it is getting power and ground go for a scanner code test.
Mt

jas45
07-01-2006, 06:56 PM
4.3 Vortex engine not sure on transfer case. Since posting I've done about ten trips of which the lght has been on seven of the ten trips. Thinking a faulty sensor??

MT-2500
07-01-2006, 09:42 PM
4.3 Vortex engine not sure on transfer case. Since posting I've done about ten trips of which the lght has been on seven of the ten trips. Thinking a faulty sensor??

A good scanner check will tell the story.
Post back codes.
MT

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