cant start a M1008 with batteries

[84cucv1ton]

two sets of charged batteries, glow plugs check out. i had to move it, i put jumper cables on. starts right up.

fully charged batteries could barely crank it over. i checked what i know. nothing worked. what could i be missing? i have no clue

thanks for the help

 

[CUCVFAN]

Dirty terminals? Clean the inside of the cable ends and the posts of the batteries with a brush. I had a truck that had some grease on the terminals and they had to be TIGHT to get good cranking power. Apparently, that grease was non-conducting...

 

[JohnFire]

Also check all large power connections and the vehicle ground. Losse connections can do the same as low batteries and dirty connections. I saw the same thing with a brand new truck that when I wired all of the emergency lights on it I didn't torque the ground down enough. I get afraid of breaking studs off. It would only start on jump or intermittent but kept acting like low batteries.

 

[84cucv1ton]

cables are all clean. i will take a look at the connections thanks

 

[84cucv1ton]

anyone, else still not having any luck

 

[emmado22]

Load test the batts.....