12-08-2018, 01:16 AM | #1 |
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Location: Loomis, CA
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Wiring help
Had a small fire today as a result of what appears to be a jammed brake light switch. Snowballed into the alternator wire and up into the terminal. Anyways i was trying to figure how how to prevent this in the future. Specifically if anyone has had luck using in-line fuses and if so what size? So far it looks like i’ll just be needing some new wires and a brake switch. Thankfully i had JUST put the fire extinguisher in the back of the car!
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12-08-2018, 01:33 AM | #2 |
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Re: Wiring help
I like the safety fuse that mounts on the starter. It usually has a 20 or 25 amp fuse and is a fail safe when you have a short that might burn the car up. I know some don't like it, but for about $10 it provides a way to keep the wiring from burning up the car in a dead short situation.
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12-08-2018, 01:55 AM | #3 |
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Re: Wiring help
And install the A&L brake light switch.
The other available switch can fail by shorting to ground! A's Always Dave |
12-08-2018, 03:26 AM | #4 | |
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Re: Wiring help
Quote:
I run a 30a circuit breaker for my main fuse and a 20a on the lighting circuit. |
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12-08-2018, 03:26 AM | #5 |
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Re: Wiring help
Duplicate post...
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12-08-2018, 04:36 AM | #6 |
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Re: Wiring help
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12-08-2018, 10:03 AM | #7 | |
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Re: Wiring help
Quote:
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12-08-2018, 10:43 AM | #8 | |
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Re: Wiring help
Quote:
I use the fuse mounted to the starter. I park our car in a cargo container and want to make sure everything is dead so I installed a battery disconnect switch. Ed |
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12-08-2018, 11:14 AM | #9 |
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Re: Wiring help
How are you isolating the lighting wiring from the main? Im assuming the 30a fuse is the safety fuse setup on the starter.
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12-08-2018, 11:24 AM | #10 |
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Re: Wiring help
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12-08-2018, 01:10 PM | #11 |
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Re: Wiring help
A 20A fuse at the cutout to the lighting switch and horn will open those circuits if a short occurs. The fuse mounted on the starter is intended to prevent the battery from discharging into the generator field through a shorted cutout after the engine is shut off. if either or both fuses open during operation, the ignition will still be powered from the generator.
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12-08-2018, 02:39 PM | #12 |
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Re: Wiring help
That is the impossible thing about understand electricity, nobody explains things the same way. Bob
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12-08-2018, 05:50 PM | #13 | ||
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Re: Wiring help
Quote:
Quote:
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12-08-2018, 10:23 PM | #14 |
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Re: Wiring help
I have 30 amp at starter and 20 amp at cut-out. Thanks Pandersen there has been some great responses.
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12-09-2018, 10:12 AM | #15 |
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Location: Sunrise Beach, Mo
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Re: Wiring help
The Model A I purchased had a short in the headlight circuit. Burnt up low beam wiring. Replaced it and then,
I installed a fuse block and 30A Fuse at the starter. Works fine! Also double checked all wiring to make sure all was working and properly wired. |
12-09-2018, 10:32 AM | #16 |
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Re: Wiring help
I always put an inline fuse in the brake lite switch because if there is a problem, it is a long way under the car to get at it on the road.
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12-09-2018, 11:05 AM | #17 |
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Re: Wiring help
I use a 30 amp ckt breaker on the starter and I also installed a battery cutoff switch in front of the drivers seat. I also lost my coupe to a wiring fire a couple of years ago. (You can search for pictures on a previous post ( search “ SAD DAY” ) .
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12-09-2018, 11:14 AM | #18 |
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Location: Grants Pass, Oregon
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Re: Wiring help
Try in search “fire”. Scroll down to “Sad day” for pictures of my totaled Coupe. 😠
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12-14-2018, 04:47 PM | #19 |
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Join Date: Mar 2017
Location: Venice, Fl and Marcy, NY
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Re: Wiring help
I had a couple issues with my brake light switch when I first got my coupe. You might find this thread interesting. just paste it into your search bar. it will take you to the thread.
https://www.fordbarn.com/forum/showt...e+light+switch |
12-15-2018, 12:47 PM | #20 |
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Re: Wiring help
Even though all the wiring is new, I took the same approach. Plus I added a battery disconnect under the drivers seat. When I pull the car inside, I shut off the gas and throw the disconnect switch. Prior to adding the switch, I pulled the battery ground cable.
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