Question about Mazda MX-5 Miata

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I noticed the other day that my day time running lights were not on. Upon checking, I wiggled the connection and the lights came on. The next time I took the car out, the same thing no lights. I again wiggled the connection and again on they came. After driving for awhile I noticed a accrid smell and stopped to check under the hood and saw that the wire harness to the lights was smoking and very hot. Unhooked the 2 connectors to the lights and the problem stopped. None of the fuses were blown. Can you help. Mike

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You'll have to unwrap the wire harness to the lights and check for wire insulation worn off and bare wires rubbing. It's also quite possible the sockets and connectors are corroded and the corrosion(green gunk) is providing a path for electricity to short out. The corrosion on the connectors could be on the tines or in the back where the wire goes in. Don't forget to check the connector in the engine compartment too.
It might be easier to replace the harness and sockets. Either way, once you have it repaired spray the wires and sockets with Rust Check or something like that to keep moisture out, and fasten the wire harness down so it doesn't vibrate and chafe wires again. Hope this helps.

Posted on Aug 28, 2010


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