Troubleshooting dead low beam.

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aIIan

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Wondering if you had any tips on how to trouble shoot a dead low beam. Trying to figure out if I need a new bulb or a new ballast as well.

Thanks.
 

iam_canadian22

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Swap ballasts sides, you will see if the issue fallows the ballast or stays at the bulb, now if your bulb that was out stays out with the good ballast from the other side and the bulb that was working no longer works with ballast from the bad side you know you need bulb and ballast
 
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aIIan

aIIan

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Now the other side is out too. What are the odds that both would die in the same week.
 

iam_canadian22

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Not very likely but possible, start by double checking all connections, i had to do some odd changes to my harness on my last truck to get everything 100%
 
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