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does anyone know how to test the cluster stepper motors? i just replaced all 6 with new ones 5 work great but one on my temp gauge wont. its getting a signal but just jumps up and down a little on ignition on then sits still for ever. i would like to put back the original one but didnt mark any of them when i replaced them and dont know which was good. wonder if i can test them cause hate to have to wait 2 weeks for new one thanks oh ya its an 04 tahoe
 

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If 99'HEARTBEAT (Mike) doesn't see your post, pm him. He's the guru of stepper motors. You might also enter stepper motors in the search box above as he did an indepth article on them & the diagnosis procedure may be in it, I can't remember
 
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