Sound like the starter? - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 3 (permalink) Old 05-05-2019, 08:38 PM Thread Starter
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Sound like the starter?

Truck is stuck at my work parking lot. Just fixed my parasitic draw yesterday, was a bad brake light switch.
So this morning was leaving work and the truck cranks for a bit but dies.
Before starting the bats are at 12.8, as soon as I turn the ignitions and the FICM staters doing its thing the bats drop to 11.8. Once I try to start it, during cranking it drops to 10.4.

Just replaced to alt, it is charging at 14.5 at the back of the alt, however it takes about a minute f running before it gets to 14.5.
I tested the FICM yesterday and it is at 48.2.
Also load tested the bats yesterday and they tested good. Any inputs?
Just wondering if the starter seems to be pulling the volts down to much.
Looking for inputs so I can fix it. Right now I'm hanging out till I can get a friend over to try to jump the truck.
Thanks

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post #2 of 3 (permalink) Old 05-06-2019, 12:26 AM
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If you load tested the batteries and they test OK then you either have high resistance in the cables or the starter itself

You’d have to voltage drop test the power and ground circuits for the starter . If you have an amp clamp you can also measure for excessive current draw.

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post #3 of 3 (permalink) Old 05-06-2019, 03:13 AM
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Re: Sound like the starter?

Read this, its a little long winded, but lots of good info. I stumbled upon it while researching for my 83 F150.

https://www.ford-trucks.com/forums/1...w-starter.html


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