Thread: Updating my Corvette

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Ken I’m running H-4s on the 57…..I like the light over the halogen.

One issue I ran into with them is the current draw. They were fine on low beam all night long (literally). On high beam after about 20 minutes they would trip the 30A circuit breaker fortunately after about a 5 minuet cooling off period the breaker would reset. I cured that with a relay located on the circuit between the headlight switch and the dimmer switch. Power to the load (headlight) side of the relay is from a wire from the battery.

Where I only had problems with the High Beams I could have probably gotten by mounting the relay on the core support and only connecting it to the high beam circuit. It would have been easier and a lot less wire.

One other option I’ve been kicking around is to replace the H-4s with LED lights at some point.

Just some thoughts.



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Originally Posted by Mike P

Ken I’m running H-4s on the 57…..I like the light over the halogen.

One issue I ran into with them is the current draw. They were fine on low beam all night long (literally). On high beam after about 20 minutes they would trip the 30A circuit breaker fortunately after about a 5 minuet cooling off period the breaker would reset. I cured that with a relay located on the circuit between the headlight switch and the dimmer switch. Power to the load (headlight) side of the relay is from a wire from the battery.

Where I only had problems with the High Beams I could have probably gotten by mounting the relay on the core support and only connecting it to the high beam circuit. It would have been easier and a lot less wire.

One other option I’ve been kicking around is to replace the H-4s with LED lights at some point.

Just some thoughts.
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I wired my headlights through two relays a couple of years ago. The dimmer switch powers the relays and the headlights are powered from the "+" on the alternator through the relays. The headlight wiring is protected by a 20 amp inline fuse.