If you’re having trouble with your Chevy 4×4 actuator, then you’re in the right place. In this article, we’ll be discussing the wiring diagram for a 99 Chevy 4×4 actuator, as well as some frequently asked questions.
What is a 4×4 Actuator?
A 4×4 actuator is a device that engages and disengages the front wheels of a four-wheel drive vehicle. In a Chevy 4×4, the actuator is responsible for engaging the front differential to provide traction to all four wheels.
The actuator is controlled by an electrical signal from the 4WD switch on the dash. When the driver selects 4WD, the switch sends an electrical signal to the actuator, which engages the front wheels.
The wiring diagram for the 99 Chevy 4×4 actuator is shown below:
| Wire Color | Function |
|---|---|
| Yellow | 4WD Indicator Lamp Signal |
| Orange | 4WD Low Signal |
| Light Blue | 4WD High Signal |
| Brown | Ground |
| Dark Blue | Motor Control A |
| Gray | Motor Control B |
| Pink | Encoder Signal |
How to Test the 4×4 Actuator?
If you suspect that your 4×4 actuator is not working properly, you can test it using a multimeter.
First, disconnect the actuator from the wiring harness. Then, set your multimeter to the continuity setting and touch the probes to the terminals on the actuator. You should see a reading of zero, indicating that there is continuity between the terminals.
Next, apply power to the actuator using a 12-volt battery. You should hear the actuator engage, and see the terminals on the multimeter show a reading of infinity, indicating that there is no continuity between the terminals.
If the actuator fails either of these tests, then it will need to be replaced.
How to Replace the 4×4 Actuator?
Replacing the 4×4 actuator is a fairly straightforward process that can be done with a few basic tools.
First, remove the actuator from the front differential by removing the bolts that hold it in place. Then, disconnect the wiring harness from the actuator.
Install the new actuator by reversing the steps that you took to remove the old one. Be sure to test the new actuator to ensure that it is working properly before driving your vehicle.
Conclusion
The Chevy 4×4 actuator is an important component of your vehicle’s four-wheel drive system. If you’re having trouble with your 4×4, then the wiring diagram and information in this article should help you diagnose and fix the problem.
