Question about 2000 Jeep Cherokee

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Burning up both brake light sockets

I am have a problem on my 2000 jeep cherokee. both of the brake lights keep melting, but the 3rd brake light is fine. I have replaced both sockets several times and finally gave up. Took it to the dealer and, they being so smart said it needed a simple $5.00 bulb. WOW.. nope didn't work and now they are screwing me. any ideas on where else I should check? Brake pressure switch ohmes? any ideas?

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First, I'd check voltage at brake light socket terminals. voltage should be the same or slightly lower than running voltage recommendation of about 13.5. (check running volts at battery with engine running. check brake light volts again with engine running, using the bulb terminal and socket as power source and ground.) If voltage is excessively high, I'd look at the charging system to find out why. If volts at battery are normal but volts at socket are low, I'd suspect a bad ground in the lighting circut, causing excessive resistance & heat, causing sockets to melt. If this is the case, re-ground both light sockets to a good ground source such as the chassis. (when attaching, scrape off paint, rust etc to insure good connection.

Posted on Mar 01, 2009

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