TGP (IL)
Active member
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- Location
- Metro East IL
Ok Rich I'm following what your saying ,
"if your front battery has a dead short or dead, you have no 12 volts until your alts start producing. thus you cant heat glow plugs.
if the front battery is just dead, it will produce 12 volts with the 24 running through it so the IP will open. IF the front battery is completely shorted or gone, I don't think the ip will open until alt turns fast enough and I am not sure if the starter will do that."
But here's my take,
If there's no 12V. at the firewall block to feed the 12V side of the truck it's not going to crank over
Because there's no 12V at the under dash starter relay.
So in reality the slave cable would be useless under your scenario?
Would the military have to put even dead batteries in just to jump it?
I think not.
Also I agree that the 12V tap is spiced into the battery cable Rendering it useless with a missing battery to complete
The circuit.
Now I need to study the schematics some to se were else, if any it can get 12V.
I just can't believe that the military would have vehicle that can't be jumped started with an Open battery.
Sure the resistors are supplying power to the GP. but that's it, if no other 12V is present.
Tom
"if your front battery has a dead short or dead, you have no 12 volts until your alts start producing. thus you cant heat glow plugs.
if the front battery is just dead, it will produce 12 volts with the 24 running through it so the IP will open. IF the front battery is completely shorted or gone, I don't think the ip will open until alt turns fast enough and I am not sure if the starter will do that."
But here's my take,
If there's no 12V. at the firewall block to feed the 12V side of the truck it's not going to crank over
Because there's no 12V at the under dash starter relay.
So in reality the slave cable would be useless under your scenario?
Would the military have to put even dead batteries in just to jump it?
I think not.
Also I agree that the 12V tap is spiced into the battery cable Rendering it useless with a missing battery to complete
The circuit.
Now I need to study the schematics some to se were else, if any it can get 12V.
I just can't believe that the military would have vehicle that can't be jumped started with an Open battery.
Sure the resistors are supplying power to the GP. but that's it, if no other 12V is present.
Tom