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Help!! 1987 mustang lx hatch


New Member
Im having some issues with tail lights. I bought the lx with spliced led tail lights. I have since installed stock lights and everything works except for one thing. When headlights are on the taillights should be turned on and when you break the taillights should get brighter. However no lights are on until you press the brakes. Please help


New Member
What happens to the tail lights when you turn the hazards on? I have a 1987 electrical diagram I can share if you think it will help. Let me know.


Active Member
Are you sure you have the correct bulbs? I believe the is one style with a single element and another with dual elements.