Re: 12 volt conversion on 1940 110 coupe
Posted by Joe Santana On 2019/5/18 12:53:37
After reading all this correct info on what you'll need to do to accomplish what you want to do (use modern 12V neg Grnd devices and ensure easy starting), I think it might might be easier to get a 6 to 12 volt converter, attach it to your battery and nest it next to the battery, run the wires from it to an installed modern device, and you're done.
I ran the wires to a modern cigar lighter receptacle which replaced the original one so I can push a charger in there and plug it into my iPhone, wireless earbuds, etc. that need 12V-neg grnd. When I'm not using it, I just put in the original cigar lighter (whose contacts don't match up with the modern cigar lighter receptacle, so it doesn't light).
I added a toggle switch next to the battery box so I can shut off the converter when I don't need it so it doesn't draw any juice.
As far as easy starting.... I bought a better grade compact charger at Harbor Freight with a read-out that also turns from red to green. It has a set of clip connectors and a set of ring connectors for permanent use. I attached the permanent connectors to the battery, brought the wires up from the battery box next to the toggle switch and then left the charger under the front seat cushion.
If the car is going to sit for a week, I just ease up the rear part of the seat cushion, grab the plug for the charger and plug it into an extension cord. If your 6V battery is always fully charged, you'll have no trouble starting, unless it's for a different reason than battery.
By accident I ended up with 2 Optima (gel) batteries, so wired them in parallel for maximum cranking power, but one would work as well.
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I ran the wires to a modern cigar lighter receptacle which replaced the original one so I can push a charger in there and plug it into my iPhone, wireless earbuds, etc. that need 12V-neg grnd. When I'm not using it, I just put in the original cigar lighter (whose contacts don't match up with the modern cigar lighter receptacle, so it doesn't light).
I added a toggle switch next to the battery box so I can shut off the converter when I don't need it so it doesn't draw any juice.
As far as easy starting.... I bought a better grade compact charger at Harbor Freight with a read-out that also turns from red to green. It has a set of clip connectors and a set of ring connectors for permanent use. I attached the permanent connectors to the battery, brought the wires up from the battery box next to the toggle switch and then left the charger under the front seat cushion.
If the car is going to sit for a week, I just ease up the rear part of the seat cushion, grab the plug for the charger and plug it into an extension cord. If your 6V battery is always fully charged, you'll have no trouble starting, unless it's for a different reason than battery.
By accident I ended up with 2 Optima (gel) batteries, so wired them in parallel for maximum cranking power, but one would work as well.
Attach file:
(845.61 KB)
(314.89 KB)
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