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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

Battery Voltage Drop

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Old Nov 14, 2021 | 11:44 AM
  #1  
don_sanders's Avatar
don_sanders
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Battery Voltage Drop

Fairly new battery (<8 months) in my truck.

Engine turns over but hasn’t fired.

Battery reads 12.4 volts when not under load. When I try to crank it voltage at the battery drops to 2-3 volts?

advice appreciated in advance.

a little more history…

Old starter locked up and so it was replaced. New battery cables and new starter cable. Solenoid is grounded, starter is grounded, block is grounded.
 
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Old Nov 14, 2021 | 12:15 PM
  #2  
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lizardman1
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From: Phoenix
Load test the battery first, make sure it is up to snuff. If the battery is ok check the battery cables and most importantly the ground cable both ends.
 
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Old Nov 14, 2021 | 01:31 PM
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If that is a reman starter you may have gotten a bad one. Or you have a bad battery. Put some jumpers on it and try it. The shop manual says .5 volt drop with the Ford starter.
 
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Old Nov 14, 2021 | 04:17 PM
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Koolkat
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Is there a chance that the battery has been frozen? Sounds silly I know but I don't know where you call home or the history of the battery.
 
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Old Nov 14, 2021 | 07:56 PM
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don_sanders
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Live in Houston, so no freeze worries.

hooked up a load tester and it came back to replace battery so it would appear to be a bad battery
 
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