Slow crank.

[Cummins1401]

New starter contacts. batteries less than a year old. Had load tested. Jumped all cables. Cross over and grounds with jumper cables. To check wires. Any suggestions?  Maybe have starter bench tested 

 

[IBMobile]

Batteries tested good, all right.   Next, even though you jumped the cables it would be good automotive practice to do a voltage drop test on them.   If the cables pass then remove the starter and bench test it.  In the video he says a drop of up to .5 volts on the positive cable is acceptable but 3% of 12 volts, 0.36v, is better. 

 

 

Edited June 4, 2021 by IBMobile

[Cummins1401]

Ill try tomorrow after work. thanks 

[Mopar1973Man]

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