![]() These diff lockers use a type of electric actuator/motor to engage the locker inside the differential. This happens when you are in 4WD 4Lo (Low range) mode and you want to engage the front or rear diff locker. This signal might be flashing red in color instead of solid orange/amber. This is another culprit that could result in a flashing 4WD locker signal on the dashboard. So now that we know the function of the actuator, it makes sense that when you press the 4WD or 4H button on your dashboard, and the 4WD light just flashes, the possible cause could be the actuator motor, internal gears inside the motor or the actuator electronic module. The beauty of this device is that negates the need for the driver to stop the vehicle, having to get out, to manually engage the vehicle into four-wheel mode by locking wheel hubs. ![]() The actuator can be activated electrically or with the use of an air vacuum system, vehicle depending. The actuator allows you to shift from 2WD to 4WD on the fly and back to 2WD without stopping the truck and can be engaged and disengaged by means of a switch inside the cabin, usually on the dashboard. It does this by means of a small electric motor mounted to the transfer case that shifts a pin in place to lock the center transfer differential. The actuator is a component found mostly on modern four-wheel drives and is designed to electronically engage 4 wheel drive. The transfer case actuator motor and switchįast forward a few decades and, enter the Actuator. Let’s look at a few of the usual suspects. What was wrong? His 4WD failed to engage properly! But why? Low and behold the 4-wheel drive light was just flashing on his dashboard. He then signaled to me to come have a look since his truck was behaving rather strangely. Now, the reason I thought this was odd was that his 4WD was well-kitted with a full suspension, tires, lockers, etc. Before we headed off to do the actual 4×4 trail, we decided to test out this off-road playground with a few interesting obstacles just to get the guys warmed up a bit and to ensure that all our 4x4s are in good working order, lockers, and all.Įverything was going fine until one mate’s very capable 4×4 failed to clear an obstacle that I had cruised over with ease. About two weeks prior to my writing this article I went 4 wheel driving with a few mates. Why My 4-Wheel Drive light blinks but won’t Engage 4 Wheel Drive Light Blinking & Not Engagingįirst, let me relate a quick personal experience. 4 Wheel Drive Flashing on your Dodge Ram?.What does the 4WD light on the Dashboard signal?.Why My 4-Wheel Drive light blinks but won’t Engage.
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