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Old 02-14-2014, 01:26 PM
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Fuse box placement

Building a 31 model A coupe and thinking I'd like to place the fuse box behind the drivers seat. What issues will I run into with the longer wires? Anybody have any experience or knowledge they'd like to share? I need all the help I can get!!

Thanks

john

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Old 02-14-2014, 02:54 PM
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these are a few that come to mind . one if you bring them thru the firewall then to the back of the seat carpet will be a problem and maybe mounting of the seat . if you bring them up from under the body and into where you want heat from exhaust or just the outside elements . do not get me wrong it can be done but a well laid out plan and extra insulation will be in order.
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Old 02-14-2014, 05:46 PM
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Also, keep in mind that all the major harness suppliers offer kits that are designed for placement under the seat or in the trunk. You get longer wires that make it easy to locate the fuse block and battery to the back of the vehicle.

Make sure you use the proper gauge wire for battery cables. Long runs require heavy cable.
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Old 02-14-2014, 05:52 PM
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As far as proper operation of devices go, you will be ok. I wouldn't be to worried about increasing sizes, not that much of a stretch there for the loads.
But as was mentioned, the harness will not work if you go that way. Then it is not that hard to extend what you need. And as mentioned, vibration and weather do kill wire. Use proper grommets and shield the wires well. I always solider every connection I make and use heat shrink over it.
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Old 02-14-2014, 06:35 PM
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There are really no issues with putting the box behind the seat though I suggest that you build a separate compartment for electricals as there will be a lot more wires then you think going there. If you have some sort of console (tough in an 'A', bundle the wires and run down the middle. If you don't you may want to run them through a conduit. Most suppliers, i.e. American Autowire, Painless etc supply enough length to do this with not a bit of problem. You will still have a bunch of wires under the dash, regardless. Oh and yes, my '31 has the American Autowire system panel behind the passenger's seat - and to date - no problems with the system.

Access panel below the speaker:




About done



It gets messy - about to be bundled wires




Dave W
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Old 02-15-2014, 07:59 AM
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Dave W
Dave, just out of curiosity.... what is the rocker switch that's mounted left/right for? Trunk lifter?
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Old 02-15-2014, 08:12 AM
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Dave, just out of curiosity.... what is the rocker switch that's mounted left/right for? Trunk lifter?
Yes. It's for a Down's trunk lift
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Old 02-15-2014, 08:22 AM
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Yes. It's for a Down's trunk lift
Jeeez. I'd be very afraid of something landing on it during a trip. Is it powered down when the ignition is hot at least?

Also, it looks like there's a suicide pin in the jamb. Belt and suspenders?
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Old 02-15-2014, 09:07 AM
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Jeeez. I'd be very afraid of something landing on it during a trip. Is it powered down when the ignition is hot at least?

Also, it looks like there's a suicide pin in the jamb. Belt and suspenders?
Not powered down ever - hot even with the battery isolator switch off for trunk and battery access. No way something could ever depress that switch without it being done on purpose plus it's well protected by the seats from junk. And if it was to be depressed - the worst that would happen is the trunk to open - no big deal - my special stash of spare hundred dollar bills wont fly out regardless.

Suicide pins are in place as it is a roadster. Even with a heluva lot of added 3/4" and 1"x.060 round and square tube stock bracing plus bear claw latches, the body still has some flex without a solid top with the potential of popping a door open if one of NY State's great roads were to spring a surprise.
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