Quote:
Originally Posted by blackestate
Jumper cables, have 3 things agains them. Size of the cable, quality of the connection, and the length of the cable. These all reduce the available power.
It is unlikely that all of the cells in the battery are dead.
Hook up the bat in the car, hook up the cables and let it "charge" for 15-20 while the truck runs, and see if it will start.
Make sure all of the connections are clean
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I agree. There are very few jumper cables that are of sufficient diameter and have sufficient clamping capability to start a diesel.
Most will simply "assist" the dead battery.
I've been in the situation of needing a jump on the SD and it's absolutely necessary to "charge" the weak battery for 15 minutes before attempting to start the engine.
The cables, by themselves, will never start the engine. The clamp has four points of contact to the post on the starter. No way that you're getting 250 amps though that setup.