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I have a problem with my 4wd in my 99 chevy tahoe 2door,

Customer Question
transfercase shift fine between all...
i have a problem with my 4wd in my 99 chevy tahoe 2door, transfercase shift fine between all the diffrent settings but front axle actuator wont engage
Submitted: 8 months ago.Category: UK Car
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Customer reply replied 8 months ago
i have also swapped out the front axle actuator twice, and swapped the selector switch panel and the transfercase encoder motor
Answered in 1 hour by:
12/14/2017
UK Auto Mechanic: Gm_Tech17,
 replied 8 months ago
Gm_Tech17
Category: UK Car
Satisfied Customers: 427
Verified

Hi my name is*****'m an A.S.E Certified Master Technician with 30 + yrs GM experience. I'm reviewing your question and would be happy to assist you.

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UK Auto Mechanic: Gm_Tech17,
 replied 8 months ago

Do you have voltage to the actuator on the front diff?

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Customer reply replied 8 months ago
i do read 11 something volts on two pins on the connector, do you have a schematic and mayde som typical measurements on the diffrent pins?
UK Auto Mechanic: Gary, Technician replied 8 months ago
Gary
Gary, Technician
Category: UK Car
Satisfied Customers: 18,028
Experience: GM master tech for 15 years/ASE master tech for 20 years
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new expert here did you still need help ?

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Customer reply replied 8 months ago
Yea
UK Auto Mechanic: Gary, Technician replied 8 months ago

is the front actuator small aluminum or big black plastic ?

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Customer reply replied 8 months ago
Black plastic
UK Auto Mechanic: Gary, Technician replied 8 months ago

with the key ON what wires show 12 volts and which show grounds at it ?

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Customer reply replied 8 months ago
I dont rememer right now ill be back in the Garage in like 2 hours, ill check then
UK Auto Mechanic: Gary, Technician replied 8 months ago

ok

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Customer reply replied 8 months ago
ive done some measurements and found out that i have:
12,5v to ground on the brown wire
0,9v on both the gray/black and black/white wire
ground on the black wire
but i also measured 42ohms to ground on the grey/black wire
UK Auto Mechanic: Gary, Technician replied 8 months ago

with the grey/black turn on and off a ground as you select 2WD or 4WD ?

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