I appreciate your time. I recently bought a 98 blazer. When I bought it, the four wheel drive would not lock in. I thought with my great knowledge it would nothing to repair but I was wrong, dead wrong. When I got it home, the front drive shaft is locked in all the time, and the front axels turn but, when you jack all 4 tires up on jack stands and put it in gear they do not turn. When you push the 4x4 button on the dash it blinks a few times and then goes out. The TCCM on the passenger floor board clicks but stops. I have changed the switches in the dash, still no good. I changed the vaccuum servo under the battery. I read your advice to someone else I checked for corrosion on the TCCM plug in, it looked good and I saw no corrosion. I tried a different TCCM box with still no results. So next I thought it had to be the only part left was the 4x4 acutuator motor on the transfer case. I have checked all vaccuum hoses and I found nothing out of the ordinary. It will not go into 4lo either. If you have any ideas that could help me out I would greatly appreciate it.
Thanks,
Jeff
98 blazer 4x4 wont engage
Any luck with this Jeff. I'm having the same problem as you. Push the button you can hear the tccm click but the light just flashed a few times and then goes out. I've checked the wiring on the tccm and it looks good, no corrosion or broken wires and i have tried to reset the computer with no luck. let me know if you have figured out what this is.
Thanks,
Amy
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