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Old 07-18-2026, 11:05 AM
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steve25 steve25 is online now
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The initial hit at closing draws between 35 to 50 amps.

This is dependent on how much voltage your battery has on hand ( good old ohms law comes into play here big time ! ) and the temperature of the starter itself, as in the higher the temperature of the solenoid coil winding then the greater the resistance there will be that the circuits available voltage and current will have to overcome.

This is why many many decades ago before the availability of gear reduction type starters we used a separate Ford type solenoid mounted like Ford did on your wheel well or firewall, and we jumped out the one on the cars starter.


Once the GM type solenoid is engaged it only takes 8 to 15 amps of current, but you need to be set up for at least 40 amps and then see if that wire gets warm in use.

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