2000 Chevy Silverado 4WD problem. Service 4WD light is on and I replaced switch...

[Rock Crusher]

...and transfer case motor...? 2000 Chevy Silverado 1500 4.8L Z71 4WD. I was having trouble with the 4WD on my truck. All lights on my 4-button selector switch were out, and the Sevice 4WD light was on. The 20 amp ATC (automatic transfer case) fuse was blowing, and it worked with a 30 amp for a week or so as I was waiting for some cash. It went out completely, and wouldn't work with the 30 amp fuse. That night I replaced the Transfer Case motor as it seemed to be the problem. I disconnected the negative battery terminal to reset the computer after installation. The service 4WD light was still on and my 4WD still wont engage. My buddy has the same 4-button 4WD selector switch, so we swapped them out, and still no luck. All the fuses seem to be fine (There is a 15 amp 4WD fuse and the 20 amp ATC fuse I mentioned earlier). Any ideas on where to look next?.... Thanks.

 

[pedro7of9]

theres a resion for a 20 amp duse..like the wires can't handle 30A...if you can't check yourself get a mechanic to check wireing,,,
i had same deal on my 99 s 10 4x4,,,new actuator and relay worked for me

 

[Jacob]

Get Out Of Your Car And Never Drive It Again If You Go In It It Could Explode Because Gangs Rigged It From What It Sounds Like.