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Old 05-24-2012, 07:32 PM
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Default Another 4WD issue

I just recently received a 99 blazer with 4 button 4wd drive. The 4wd drive does absoultey nothing. No indicator lights on 4x4 switch what so ever. no blinking or anything. cant here anything wanting to do anything at the transfer case or by the pass kick panel either. Been searching through numerous posts and have not found any thing the states similar issues. Testing the switch I came up with these results

No button pushed 9.09kohms thats what im seeing

4 Low button pushed 2.345kohm Im getting 2.346kohm

2 high button pushed 1.156kohm thats what im seeing

Auto 4wd button pushed 64 ohms Im getting 64.5ohms

does being of by that much indicate a bad switch

I dont want to purchase a new switch when im unsure if what i have is a bad switch
Thanks in advance
Steve
  #2  
Old 05-24-2012, 07:42 PM
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Could you explain in more detail what it is you are testing? The resistance measurements are between what two points?
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Old 05-24-2012, 08:08 PM
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If nothing is lighting up in the switch, that would indicate a problem with either the TCCM itself or the power/ground to the TCCM.
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Old 05-24-2012, 08:17 PM
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Thanks for the quick response. Ill def check that out. cant beat a free blazer now to work all the bugs out
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Old 05-24-2012, 08:34 PM
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what swartlkk said...i had a similar issue.
the connectors at the tccm had corrosion on them.
it took two tries but i finally have them all cleaned up and it works great....just in time for summer.
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Old 05-25-2012, 04:16 PM
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all the connecter at the tccm seemed to look clean no corrosion, put a little dielectric grease on them still no change. gonna check to see if the module is getting power if it is, I have to assume the tccm is junk
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Old 05-25-2012, 06:07 PM
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Don't forget to check the grounds to the TCCM as well. Anything electrical needs both a power & ground to complete the circuit.
Old 05-25-2012, 06:07 PM
 
 
 
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