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Head lights popping,alternator voltage?

si_d_2003

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Location
United Kingdom
Car
Accord 2.2 CTDI
Hey guys, I have a common problem with the dip beam headlights popping. In the space of 6 months of owning the car I must of put 10 bulbs in it. I doesn't have any condensation and the caps are on the back to seal them and its both sides that blow one at a time.
Just out of curiosity what charging voltage do you expect to find with no ancillary on or headlights on? I checked mine and it was charging at 14.2 which isn't too excessive. If the the alternator was over charging, then surely the side lights would be the first to go?
I have just bought some hid's but I want to be sure before I fit them that I've covered all possibilities.

Cheers
 
14.2 is correct.
 
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