1990 Ford Mustang Convertible Malfunction - Electrical & Lighting Systems


Question: i modified my 1990 lx 5.0 convertible by putting on a cobra intake.afterwards, i tried to turn my lights on and go take it for a spin, but they didn't work. actually nothing was working inside the car except the high beams and emergency flashers.i checked all the fuses and relays i could find, but am still clueless.i don't know what could have happened.any help at all would be greatly appreciated.thank you.

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Technican: I won't be able to access a schematic before tomorrow but I'm thinking there has been a wire left disconnected or loose. From your description I would look for a fusible link. The ground connections for the lights are not normally made to the engine but would be on the body. With so many systems effected I'm thinking we need power, not ground. Can you follow the battery positive cable (and any smaller wires also connected to the positive post) to their connection point at the other end? Fusible link wire (if bad) will litterally pull apart with little effort if it has burned in two and opened a circuit. High amp fuses in the relay panel under the hood have the window that lets you see if they have failed. Was the ignition key "OFF" when you reconnected the battery?
Owner: thank you very much. when my dad replaced the positive cable, he left off one of the connections to the starter solenoid and now it works. it was stuffed under all the other wires.i appreciate your help very much.

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