4 wheel drive diagnoses
Thread Starter
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Starting Member
Joined: Jan 2018
Posts: 2
From: Montana
4 wheel drive diagnoses
My 98 blazer will not go into 4hi or 4lo just blinks. So I replaced my transfer case switch, checked under the battery and the actuator pump seems to be in fine condition, everything appears to be hooked up just fine and no vacuum hoses are broken or leaking. Any ideas?
BF Guru
Joined: Dec 2016
Posts: 5,588
From: Moscow, ID
Did you check the Transfer Case Control Module that resides in the passenger side kick-panel? Is the TCCM clicking? I had mine go out on me giving similar symptoms.
Do you have the 4-Button or 3-Button system?
Do you have the 4-Button or 3-Button system?
Thread Starter
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Starting Member
Joined: Jan 2018
Posts: 2
From: Montana
I have the three button system. I don’t believe it is clicking but definitely something I will look at any ideas help at this point. Thank you.
BF Guru
Joined: Dec 2016
Posts: 5,588
From: Moscow, ID
There should be some clicking as I believe the TCCM has relays in it to direct power to different circuits.
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