What sensor is it that controls the dash light indicators for four wheel drive and antilock brake system in a Dodge Dakota truck?

There isn't one single sensor that controls the dash lights for both 4WD and ABS in a Dodge Dakota. Each system has its own set of sensors and components that monitor their operation and illuminate the corresponding warning lights on the dashboard.

* 4WD Indicator Light: This light is typically controlled by switches and sensors within the 4WD transfer case itself. These sensors monitor the position of the transfer case shifter and may also include sensors monitoring things like engagement of the 4WD system. A malfunction in any of these components could illuminate the 4WD light.

* ABS Indicator Light: The ABS light is controlled by the Anti-lock Braking System (ABS) module. This module receives input from wheel speed sensors (one at each wheel) to monitor wheel speed. If a wheel speed sensor fails, or there's a problem within the ABS module itself, the ABS light will illuminate.

Therefore, diagnosing which system is causing a problem requires checking the relevant sensors and components for each system separately. A diagnostic scan tool will help pinpoint the exact cause.