2000 Blazer,4x4 not working, no service light on, but will not engage.I replaced the accuator under the batt. tray last year. That fixed it. But we had a snow storm last week and now it wont work.I can hear clicking when I push the buttons,relays im guessing.And sometimes the blazer jolts a little and I think it engaged. But no. Plese give any suggestions. OB
if it is vaccum operated i would check and see if you are getting vaccum to the transfer case switch.if you are i would remove the switch and see if it is opening and closing.if it is working ok i would say it is your tranfer case module.if it is vaccum operated i would check and see if you are getting vaccum to the transfer case switch.if you are i would remove the switch and see if it is opening and closing.if it is working ok i would say it is your tranfer case module.
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I have a 2001 chevy blazer and for the last three years when i tried to engage by 4x4 the light would just flash, in any mode, low, high, or auto. I found a vacuum hose disconected located near the top center of the firewall. I plugged it in and i was good to go. After researching I found it is a common problem. The hose goes to the actuator under the battery.
If it's like any other Blazer, a possible simple fix is to disconnect the battery for about 10 minutes. That resets the computer system. It worked for my Blazer. I had the same problem. Mine went into low range, but my front axle wouldn't engage. So give it a try. The only thing you'll mess up is the clock in the radio.
my 01 blazer 4x4 did the same, light flashed but never fully engaged. take out your battery and battery tray and underneath the tray is your vaccum, i found my hose had been knocked off, i slide it back on and it worked and has been doing great ever since.
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