Q: Turn knob to four wheel drive but won't go into four wheel drive. I changed the switch and actuator but it won't work

asked by on

I turn switch for 4 wheel drive and it don't go into all it does is flash and goes back to 2 wheel hi I can hear a click but it don't go I changed the switch and actuator

My car has 175000 miles.
My car has an automatic transmission.

Hello. The 4WD system consists of a module, encoder motor, and actuator. The module operates the transfer case (component that sends power to the front differential). The transfer has an encoder motor that shifts the transfer case by the commands of the module. The front differential has an actuator to engages the axle assemblies to the differential. The flashing light is a default operation of the module. The module’s data would have to be read and look for any fault codes in the system. If you’d like to have this looked at, a certified technician from YourMechanic can come to your location to inspect this issue in person and advise you on repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Turn knob to four wheel drive but won't go into four wheel drive. I changed the switch and actuator but it won't work

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Low oil comes on..trys to stall while accelerating...jerks,etc. Will not start.

Hey there: The problem you're having with your GMC Envoy stalling could be caused by all or one of the components you've mentioned in your question. A dirty fuel filter will restrict the flow of gasoline to the injectors, as...

Q: some times my 94 silverado accelerate and turn on service engine soon ligth, and turn off key a fey seconds run normaly. thanks fo

Hello. There are countless potential reasons for your Check Engine Light being on. Older GM vehicles such as yours, seem to have a habit of extinguishing the Check Engine Light as soon as the condition that triggered it is no...

Q: I have a 2005 trailblazer

Your vehicle can use up to 15% ethanol with no ill effects and such use (of E-15 for example) does NOT require regular use of any particular fuel system "cleaner". Most gasoline vended these days already contains a sufficient additive...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.