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sprinkles08, ASE Certified Technician
Category: Chevy
Satisfied Customers: 22802
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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2002 Chevrolet avalanche 1500. My 4x4 isn't working. If I

Customer Question

2002 Chevrolet avalanche 1500. My 4x4 isn't working. If I push the button to 4hi i can hear the encoder motor moving in the light stays on for 4hi. My front axle inst locking in. After looking everything over I found corrosion in the 6 pin connector on the encoder motor. My question is whats the path of communication for this system so I know where to start.
Submitted: 9 months ago.
Category: Chevy
Expert:  david craig replied 9 months ago.

Hi Im David, thanks for using the site. i can pull a print for you so you can track it down.

Expert:  david craig replied 9 months ago.

you can start with this

Customer: replied 9 months ago.
Thats not helping me. I dont understand how to read those.
Expert:  david craig replied 9 months ago.

then i dont know how else to help you. if you cant read a schematic, its going to be hard to help. i will opt out and let someone else give it a shot. good luck.

Customer: replied 9 months ago.
just looking for an explanation of whats being powered up and when.
Expert:  sprinkles08 replied 8 months ago.

Hello and welcome to JustAnswer!

If you found corrosion on a terminal then that's the first thing that needs to be addressed. IF the corrosion can't be removed with contact cleaner and light scraping then the affected terminal will need to be replaced. If it's on a connector then the connector will need to be replaced, if it's on the transfer case motor itself then that would require replacement of the motor. The corrosion may be affecting both the male and female terminals so both sides may need to be replaced.