Some Lincoln Town Car owners report experiencing issues with the brake light switch wire consistently burning out. Common causes for brake light failure include burned-out bulbs and a faulty switch. Owners are advised to inspect the wiring harness connected to the brake if the switch appears functional but the lights do not illuminate. For those with stuck brake lights, unplugging the wiring harness to the brake pedal switch can help diagnose whether the issue lies with the switch or the wiring. Additionally, a missing ground wire can be tested by running a jumper wire as a substitute. In one case, a professional technician encountered a similar problem with the brake light switch harness melting and referenced Technical Service Bulletin (TSB) number "02-13-6" for guidance. To prevent further issues, some owners have had success by cutting the wires at the brake switch and installing new spade connectors, as well as replacing the brake light switch if other lights are functioning properly. Systematic troubleshooting is essential, and consulting a professional mechanic or relevant technical bulletins may be necessary if the problem persists.
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