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4WD actuator

Tiny
BERT4HOYT
  • MEMBER
  • 1994 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
I purchase upgrade actuator and install it on my 94 chevy silverado k1500 pickup and only 4wd low engages and hi won't what else can be wrong
Monday, March 16th, 2020 AT 10:52 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Is it shifting between 4 lo and 2 hi? If not, have you checked for issues at the actuator on the transfer case? Is the front axle actuator working?

Let me know.
Joe
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Tuesday, March 17th, 2020 AT 5:30 PM
Tiny
BERT4HOYT
  • MEMBER
  • 5 POSTS
Yes it shifts from low to hi but only low works and the light also works, but not in hi. I can hear the actuator engage in low and not hi. I drove in 4wd low work grade.
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Tuesday, March 17th, 2020 AT 5:39 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

Was this an issue prior to replacement of the actuator? When you say actuator, exactly what part are you referring to? If you are getting power for 4 low, you should get it for 4 high unless the switch itself is bad.

Let me know.
Joe
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Tuesday, March 17th, 2020 AT 6:07 PM
Tiny
BERT4HOYT
  • MEMBER
  • 5 POSTS
I did replace transfer case switch and upgrade actuator with the new wire harness and the brown wire to the power wire of the transfer case switch or am I wrong?
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Tuesday, March 17th, 2020 AT 6:35 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
No, the brown wire is power. See if there is power to it when you select 4hi.

Joe
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Tuesday, March 17th, 2020 AT 6:38 PM

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