4 WHEEL DRIVE LIGHTS FLASH

  • Tiny
  • Pointer
  • 1999 Chevrolet Silverado
  • 154,000 miles

99 silverado 4 wheel drive lights flash and will not engage. I already replaced actuator and selector switch on dash.

Monday, January 30th, 2012 AT 11:22 PM

5 Answers

  • Tiny
  • hmac300
  • Expert
  • 41,648 posts

Is the actuator getting POwer? Is the switch getting power.

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Tuesday, January 31st, 2012 AT 12:27 AM
  • Tiny
  • Pointer
  • Member

Yes to both. But I dont know on what pins (4 total) should have power or when to the actuator. Ordered a Dorman 600-901 4WD Transfer Case Shift Motor Encoder last night. Could this be the problem? If not its returnable. Thanks

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Tuesday, January 31st, 2012 AT 12:49 PM
  • Tiny
  • hmac300
  • Expert
  • 41,648 posts

Thoseare teh number 1 cause of your problem. If you really need the schematic I can send it later just let me know

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Tuesday, January 31st, 2012 AT 12:51 PM
  • Tiny
  • Pointer
  • Member

"those are the number 1 cause" do you mean the actuator or the encoder?

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Tuesday, January 31st, 2012 AT 12:57 PM
  • Tiny
  • hmac300
  • Expert
  • 41,648 posts

Encoder motor. I'll send you the schematic later so you cancheck both though

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Tuesday, January 31st, 2012 AT 2:03 PM

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