Q: 4x4 not working after many part replacements

asked by on

My 4x4 still isn’t working - I’ll explain… The GEM module has been changed, as well as the vacuum switch, selector switch, both relays, and I also checked the fuses. There’s still no power going to the switch and/or transfer case motor. Both the 4x4 light and the low range light come on when I start the truck. Is there another module behind the dash that I haven’t located that should also be replaced or is this a different problem?

The system would need to be tested for input and output controls from the GEM module. The GEM should also be setting a code for an internal problem. Once the codes are received, then a diagnosis can be done to locate the problem. If you need help gathering the codes, a technician from YourMechanic can inspect your car’s reduced power and assist with the appropriate 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. 4x4 not working after many part replacements

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: Q: The fuel gauge is stuck on full

Hi there. It sounds like you have either a faulty fuel gauge fault or the fuel sender in the fuel tank is faulty. Does the gauge go to zero when the key is turned off and removed? If so, then...

Q: My batteries keep draining down

Hi there. Assuming both batteries are good, the alternator is properly charging. This would lead me to believe there is a parasitic draw on the batteries. This draw must be excessive to run down both batteries. You could attempt...

Q: 4wd engages but vehicle bucks like 4wd is slipping.

There is likely an internal issue going on within your transfer case. The most common cause of transfer case slippage is low fluid. I suggest that the transfer case fluid condition and level is checked. If the two wheel drive...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.