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Old 09-03-2007, 06:16 PM
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Starting '48 Ford Flathead

I've started to have a problem starting my '37 Pickup. It has a '48 Flathead with an electric fuel pump. Normally, when I turn the key on the dash, I hear the fuel pump going and after about 20 sec. I push the dash start button. The engine turns over and starts up very quickly. Now, however, I don't hear the fuel pump running and the doesn't want to start. The only way I can get it to start is to turn on my headlights. The fuel pump runs, though not as loud nor as fast, the engine turns over and finally starts. Question: Is this a ignition switch problem, a fuel pump problem, a wiring problem, or what?
Thanks for your help.

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Old 09-03-2007, 10:37 PM
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Power

The fastest way to check this is to beg or borrow a multimeter and check for power at the pump. The fact that the pump seems to work with the headlights on sounds a bit like a poor earth at some point. Check and clean all your earth points as this is an easy job without getting too serious.
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Old 09-03-2007, 11:32 PM
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earth - ground
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Old 09-04-2007, 10:57 PM
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Doc here,

How is the pump wired?


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Old 09-05-2007, 09:24 AM
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Starting '48 Ford Flathead

Thanks for your reply. I'm just starting to check it out. I find it strange that by turning on my headlights, the pump begins to pump and the start button works. If I don't turn on the headlights, pump doesn't pump and starter button doesn't work. Its like the circuit is flowing backwards from the headlight switch??? Once headlights are turned on, starter works, engine turns over and starts. After starting, I turn off headlights and everything works fine. Even ignition switch will turn off the engine. Strange.........
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