1. Simple Checks (Before anything else):
* Check the brake fluid level: Low brake fluid can trigger both lights. Top it off if necessary, but only with the correct type of brake fluid for your vehicle. A low level may point to a leak somewhere in the brake system.
* Inspect the brake light switch: A faulty brake light switch can also cause these lights to stay on. This is a relatively inexpensive and easy part to replace.
* Check all fuses related to the ABS and traction control: Consult your owner's manual to locate the correct fuses. A blown fuse is a quick and easy fix.
2. More Involved Checks (Requires some mechanical knowledge and possibly specialized tools):
* Scan for Diagnostic Trouble Codes (DTCs): This is the most crucial step. You'll need an OBD-II scanner (preferably one that can read ABS codes, not all basic scanners can). The codes will pinpoint the specific problem area. Auto parts stores often offer free code reading services.
* Inspect the ABS wheel speed sensors: These sensors are located near each wheel and monitor wheel speed. Dirt, debris, or damage to the sensors or their wiring can prevent them from functioning properly, leading to illuminated warning lights. Inspect them visually for damage and carefully check the wiring for breaks or corrosion.
* Check the ABS module: The ABS module is the "brain" of the system. It's more complex to diagnose and may require professional attention. A faulty module often requires replacement. Testing this requires specialized tools and knowledge.
* Check the wiring harness: Look for any damage, corrosion, or loose connections within the ABS system's wiring. This can affect sensor readings and module functionality.
* Check the ABS pump: The pump may be faulty, causing pressure problems in the system. This is a more advanced diagnostic that usually requires professional tools and expertise.
Important Considerations:
* Safety First: While investigating, always be mindful of safety. Never work on the braking system while the vehicle is running. If you're not comfortable performing these checks, it's best to take your Town Car to a qualified mechanic.
* Professional Diagnosis: If you can't find the problem after checking fuses, fluid, and visually inspecting sensors, a professional diagnosis is highly recommended to avoid costly mistakes or unsafe driving conditions. The codes obtained from the scanner will greatly assist a mechanic.
* Year-Specific Information: Since it's a 1999 model, some information might be slightly different than more modern vehicles. Consult a repair manual specific to your 1999 Lincoln Town Car for detailed diagrams and instructions.
Don't drive the car extensively with these lights on, as the ABS and traction control systems are crucial safety features. The underlying issue could affect braking performance.
