Pass power window

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jdrucke

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iowa
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jeff
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1984
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GMC Sierra 2500
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350
Passenger side, power window will not work from either switch. All parts have been replaced. New motors switches also added a heavy duty wiring harness from LMC truck.
 

Zelph

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Nevada
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David
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1989
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K5
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350 TBI
Do you have power at the switch?
 

fast 99

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Brian
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K20
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350
Assume the question is what's wrong? Need to check power at either the switch or motor whatever is easier first. Then proceed uphill or downhill to the problem.

Been repeated here numerous times, new parts are suspect until proven otherwise. Lots of junk out there.
 

gmbellew

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glen
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suburban 1500
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find the wiring or service manual for your year in the reference manual. there is diagnostics to follow to narrow down the problem. if it worked before you added the LMC kit (I assume a relay kit) I'd suspect that an installation mistake may have been made or a new part is bad. it'd be hard to mess up something on replacing a switch or motor. but splicing in a relay kit is an area where you could have mixed up something.
 

Broken85

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Cumberland, NJ
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A
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1985
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K10
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350
This kits come with an up and a down relay for each side (4). I wired that kit also. Mine came with a bad relay and the window was stuck up. If it is up and won’t go down, or vice versa, swap the relays and see if it works. They plug in and out of the harness so they are easy to replace.
 

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