negative grd 6v

cvicky

Senior Member
my 54 flat head 6v, i guess is negative grd ??? (i borrowed a 6 V battery)
Question : battery + goes to block - to solenoid ???
 
They were Positive ground originally.
Positive battery cable to the engine block or head, Negative cable to the starter solenoid.

If it's been disconnected for a long time and you'd like the charging system to possibly work, it shouldn't hurt to Polarize it. If you need instructions for that it's very simple.

With the wiring all connected but before you start the engine, remove the Field wire from the voltage regulator and brush it across the Battery terminal of the voltage regulator, then reconnect the Field wire to it’s position on the voltage regulator.

With any luck the voltage regulator terminals are labeled.
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Nothing wrong with negative ground if you want to keep it that way. Most parts are not polarity sensitive. Radio may be one that is.
 
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The ignition coil is polarity sensitive and if the car has a clock they usually are also.
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All early Fords had a 6-volt positive ground electrical system until 1956. For the '56 model year, all American made cars switched to 12-volt NEGATIVE ground.
So for the Canadian '54 Ford, to crank the starter, you need to connect positive (+) to engine ground and negative (-) to the terminal on the starter.
DO NOT connect batter up backwards to the whole system. It could result in damage to some components in the dash and burn up contacts in voltage regulator. You would also need to re-polarize generator back to positive ground.
 
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