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Old 10-23-2018, 09:11 PM   #6
In the land of the midnite sun
Fbks_Cruiser's Avatar
Join Date: Apr 2016
Location: Fairbanks, AK
Posts: 90
Re: GMC headlight upgrade issues

What wattage H4 bulbs did you use? Standard H4s are 55/60W and can go much higher. I believe the stock were closer to 35W. The higher wattage would trip the breaker.
1972 GMC K2500

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