Q: All 4wd selector lights are on

asked by on

I have checked the 4wd actuator vacuum and lines, they're all working (in good shape, no leaks in lines). They don't seem to be engaging though. My blazer's 4wd selector switch lights are on and neutral is red. I'm not sure if it's a problem with the selector or the encoder. I'm thinking it could also be a problem with the transfer case control module. I'm not entirely sure.

My car has 180000 miles.
My car has an automatic transmission.

The transfer case module is on the computer network and capable of storing diagnostic codes. Your system could have any of the three problems you stated and also wiring problems.

The system would need to be scanned and diagnosed for the codes retrieved. You would save money in the long run getting the system diagnosed instead of throwing parts at it until it starts working again.

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. All 4wd selector lights are on

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: 1997 Chevrolet Metro won't start won't turn over

Hello. It sounds like the timing belt is not in time and if the timing is off, the engine will not start. When replacing the water pump, the timing belt must be removed and this could affect the timing of...

Q: Q: Warning light coming on

Are and of the gauges not acting like they normally do? On your vehicle a common failure is of the oil pressure sending unit. When this happens your gauge will display zero oil pressure and cause the check gauges light...

Q: bleeding brakes but no pressure

Hello. This will occur if you allowed the brake fluid to get low enough during the repair and allowed air into the system. Once this occurs the only way to get the air out of the ABS module is by...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...