Tim Hogan

When the brake pedal is applied the Rt front marker light, Rt rear turn signal light along with all brake lights aluminate?

GregTwoJeeps

I am NOT an auto electrical tech, but I say always start out with the easy stuff whenever working on any problem search. So, make sure that ALL of your exterior lamps are working as they should, (tail lights, marker and turn signals etc) while the brake is not applied. A dual filament lamp sometimes can oddly drop a filament and then possibly short out the remaining working filament, while causing electrical weirdness.

Any loose wires in the lamp's wiring connector, bent or corroded pins, or a loose grounding connection, can make the power to the lamps go "hunting" for a complete circuit, while energizing other lamps. If you are electrical work savvy, the use of a cheap digital voltmeter can be used to check for voltage at the lamp pins and the needed grounds.


Once confirmed that all exterior lamps work as they should, and the issue in the OP is still present, I guess the parts cannon could be fired... and just replace the brake light pedal switch. (BLPS)

If that does solve the problem, it will be cheaper that taking the Jeep to an auto electrical shop. If the new BLPS does not cure the issue, (you will have a spare BLPS at least) then the electrical shop/service center it may end up needing.... because the problem could be in the vehicles wiring harness connectors, junction blocks, a relay, on and on and on.

Good Luck and all JMO