1995 GMC YUKON BLOWN 4WD FUSE

  • Tiny
  • Oldyuke95
  • 1995 GMC Yukon

Electrical problem
1995 GMC Yukon V8 Four Wheel Drive Automatic 102000 miles

System was working fine, then I attempted to engage the 4WD and nothing happened. I checked and found that the fuse for the 4WD was blown. I replaced it and tried again to engage the system. As soon as the lever was pulled, I could hear the fuse blow. We had recently had a large snowfall, with 2-3 foot drifts crossing some roads. I busted through several of these deep drifts, so I thought that I might have knocked a wire, or damaged a plug. There was no visible damage to any wiring, or the plugs. There is obviously something causing a short, but it seems odd that it would work, then within a matter of hours simply stop. Switch, relay? I really don't want to just throw parts at it, anyone ever deal with this before?

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Wednesday, January 28th, 2009 AT 12:33 PM

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  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

Hi:
Unplug the wiring to the 4wd actuator on the transfer case and see if the fuse blows when you turn the switch. If it doesn't, I feel the actuator itself may be the problem.

Let me know what you find.

Joe

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Wednesday, January 28th, 2009 AT 5:29 PM
  • Tiny
  • Oldyuke95
  • Member

Disconnected actuator and tested, fuse did not blow. Replaced part and all works fine now.

Thanks!

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Monday, February 9th, 2009 AT 9:08 PM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,409 posts

Hi:
That is good news. The reason I had you disconnect the actuator it to determine if there was a short before the power got there. I'm glad it's fixed.

Joe

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Tuesday, February 10th, 2009 AT 11:43 AM

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