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Originally Posted by KSLucas
I upgraded the stock headlamps on my '73 450SL to Hella's 5 1/4" H4 (60/55 W) and H1 (55 W) lights, which the Mercedes part's dealer said were direct replacements. The 8 amp fuse won't take the load. The low beams work fine. However, activating the high beams blows the fuse. I know I've seen this topic discussed before, but I can't locate it. Any info on how to resolve would be appreciated.
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8 amps. Are you sure thats the right size fuse. 55w @ 12V = 4.5 amps times 2 lights = 9 amps with the brights on thats 6 filliments going ~ 30 amps.
You will need to use relays. Use your 8 amp circuit to activate the relay and run higher fuesd power through the relays. Or just relay the highbeam circuit only, its probably safer that way.
John Roncallo