What could cause the ABS and brake light to come on a Dodge Ram 1500 AWAB?

The ABS and brake lights illuminating simultaneously on a Dodge Ram 1500 (especially an AWAB, which likely indicates a model year with Anti-lock brakes) usually points to a problem within the braking system, often related to the ABS module itself, but not always. Here are some potential causes:

* Low Brake Fluid: This is the most common and easiest to check. Low fluid indicates a leak somewhere in the system, which is a serious safety concern. Check the brake fluid reservoir immediately.

* Faulty ABS Module: The ABS module is the "brain" of the anti-lock braking system. A malfunctioning module can trigger both warning lights. This is often a costly repair requiring professional diagnosis and potentially replacement.

* Faulty Wheel Speed Sensor (WSS): These sensors monitor the rotation speed of each wheel. A faulty sensor can confuse the ABS module, causing the lights to illuminate. They are relatively inexpensive to replace compared to the module.

* Faulty ABS Pump Motor: The ABS pump is a crucial part of the system. If it fails, it can cause the lights to come on.

* Brake System Leaks: Besides low fluid level, a significant leak anywhere in the brake lines or calipers can cause problems, activating the warnings.

* Brake Master Cylinder Issues: A failing master cylinder can compromise braking pressure and trigger the lights.

* Wiring Problems: Damaged or corroded wiring connected to any part of the braking system can cause intermittent or persistent issues, including illuminating the warning lights.

* Faulty Brake Light Switch: While less likely to illuminate the ABS light, a faulty brake light switch can cause both lights to come on if the system is misinterpreting the signal.

What to do:

1. Check Brake Fluid: This is the first and most important step. If the fluid is low, find and address the leak *immediately*. Driving with low brake fluid is extremely dangerous.

2. Have it Professionally Diagnosed: Unless you are experienced with automotive diagnostics and repair, take your truck to a qualified mechanic or dealership. They have the tools (OBD-II scanner) to read the diagnostic trouble codes (DTCs) that will pinpoint the problem much more accurately. Guessing and replacing parts randomly can be very expensive.

Ignoring these warning lights is extremely dangerous. Do not drive the vehicle until the issue is resolved.