Q: 4x4 won't engage

asked by on

The 4x4 is not engaging even though the light flashes.

Hello. If the 4 wheel drive is not engaging, then there is typically a problem with the transfer case electronics. The most common cause on your vehicle is a bad connection on the transfer case. I would typically remove the connections and clean them with electrical cleaner and then apply dielectric grease on them. You can always have a certified mechanic inspect the electrical components on your vehicle if you don’t comfortable doing the stated procedure. If the problem persists, then the 4 wheel drive control module needs to be scanned for codes to see if the module or if the actuator is failing. If you need further assistance, I recommend you have a mechanic, like one from YourMechanic, scan for trouble codes to make an accurate diagnosis.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. 4x4 won't engage

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: Key not releasing from ignition

Hello. You appear to have a worn safety shifter position switch, which requires the transmission be in Park to remove the key. Move the shift lever a few times firmly into the Park position, and re-enter your key. There is...

Q: Picking right master cylinder

If you are having a problem bleeding the brakes then you may need to use a pressure or vacuum bleeder and a scanner to put the ABS in bleed function. If continue to have a problem with low pedal then...

Q: 4WD is not engaging on my1997 Chevy Blazer

Hi there. The problem with the transfer case can be caused by the encoder motor/transfer case motor loosing power, the transfer case engagement switch failing or loosing power, the vacuum actuator under battery tray loosing vacuum, the vacuum actuator valve...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...