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(question) Have you installed a new CD player or radio/stero system? Does the hazzard lights work? Do you tow anything? More than likey it is a ground problem. The same thing happen to a friends truck and when he started the engine the lights would work until he put it in gear, then, no running light on the left side. It liked to drove me crazy trying to help him because he had done all the afore mentioned things. I took the radio out, replaced it with the original one, traced all the wires, and found that the hazzard light switch had been bypassed resulting in the malfunction. So if you have installed a new or different sound system make sure that the wires are connected properly. I'm sure there is someone who knows exactly what is wrong. I hope you get it working . This is just something that I have ran across in the past. Make sure when you check the ground side of the socket that it is grounded. If bad comes to worse, jump the left to the right/ park lights only. good luck

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โˆ™ 2011-09-13 12:29:32
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Q: On a 1989 Chevy Blazer S-10 why would left side running light not work we have changed the bulb tested the wire changed the socket but no problems with either brake lights or blinkers HELP?
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