Re: 1928 533 Circuit Breaker Relay
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Home away from home
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Do you have a schematic of that you're planning?
I have just a couple notes: - With only a 20 amp generator you should be able to use 12awg wire instead of 10. But really the only reason to do so is that it's easier to work with. It's cheaper too but that's negligible compared to the value of the car. - Traditionally cigar lighters are not switched by the ignition so if I were you I would have yours that way. And by "traditionally" I mean up to the mid-2010's. ![]() - Is your horn electric? - What are the values for the fuses? And is all the current going thru the ignition switch, or does the switch power a relay for the accessories?
Posted on: 2022/7/31 22:34
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1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog 1955 Clipper Super Panama | Registry |
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Re: 1928 533 Circuit Breaker Relay
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Home away from home
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-Yes the horn electric.
I use 10 AMP fuses for the #14 and #16 wires and 15 AMP fuses for #12 ALL power goes from the: ammeter --> IGN switch --> relay -->fuse panel or ammeter --> IGN switch --> relay -->coil
Posted on: 2022/8/2 14:14
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Re: 1928 533 Circuit Breaker Relay
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Forum Ambassador
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Horns and lighters are heavy current draws. Usually they are unfused and not run thru the ign switch. Those diagrams I looked at have the horn relay fed directly from a constant hot wire. Some models did run thru the ammeter, others not.
Didn't find a spec for your model but the mid 30s and onward years that did provide specs list on average 22-25 amps with two horns and 33-36 with three. With that logic a single horn is drawing around 12 or so amps so if you are going to fuse or switch it on or off I would plan accordingly. Lighter elements have a fairly low resistance when they connect up and probably draw that much if not more.
Posted on: 2022/8/2 15:50
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Howard
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Re: 1928 533 Circuit Breaker Relay
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Home away from home
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Howard:
Thanks for the input. I will move the cigar lighter off the ignition switch and feed it off of the ammeter with an inline fuse. (I just picked up a couple from YNZ) I appreciate everyone's input. Gar
Posted on: 2022/8/3 18:50
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Re: 1928 533 Circuit Breaker Relay
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Home away from home
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Only issue is can the switch contacts handle all the amperage?
If no, then you need an amp rated relay in the circuit. I doubt the ignition switch is rated for that much power or they might have done this from the factory. A cigar lighter will pull about 20A itself. It may work but at some point may melt down. The battery is the amperage culprit, not the generator output. Anything connected gets full power.
Posted on: 2022/8/3 19:34
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Re: 1928 533 Circuit Breaker Relay
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Home away from home
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Unless you have a 50 amp ammeter I would not even run a cigar lighter off of that. I believe on a 6V system they use 15-20A.
Posted on: 2022/8/3 19:39
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1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog 1955 Clipper Super Panama | Registry |
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Re: 1928 533 Circuit Breaker Relay
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Forum Ambassador
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Common practice was that both the horns and cigar lighters bypass the ignition switch and are fed from the ammeter.
Posted on: 2022/8/3 20:07
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Re: 1928 533 Circuit Breaker Relay
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Home away from home
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Yes but AFAIK ammeters are only rated for the current they can display. I would be cautious about hooking up high current loads to it if it's, say, a 20 amp ammeter to match the 20 amp generator.
Posted on: 2022/8/3 20:57
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1955 400 | Registry | Project Blog
1955 Clipper Deluxe | Registry | Project Blog 1955 Clipper Super Panama | Registry |
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Re: 1928 533 Circuit Breaker Relay
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Home away from home
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Not only that but putting the horn through the ignition whether by relay or not my violate vehicle code so be sure to check it first.
Posted on: 2022/8/3 22:02
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