Originally Posted by Johnkb528
its when i turn the key to start the engine the truck dies. even tried with being jumped
A bad connection at the terminal and it wouldn't matter if 2 batteries were boosting it . When I have a bad connection , I usually get 1 click then all systems have no power , even boosting . I have heard that series of clicking from the glove box area (relay panel location) , mostly because of low voltage . My guess would be your power supply wire has a connection equal to if you ran speaker wires for powering the jeep .
What I would try is , turn the key to the "on" position , and try to start it by jumping directly at the starter . The starter is fed directly from the battery , it could be tested with the ignition off also , should just crank the engine and not start . Myself , I'd like to have it run so it would narrow down the issue .
If you try
-Becareful not to touch anything else when jumping , it's semi tight .
-get a good solid connection . little spark show if you don't . No biggie , just avoid it as much as you can .
-make sure vehicle is in park , and what ever it takes to make sure it won't roll if started . Handbrake , etc etc , be safe
For now , I think it's the next step . Guess you could make sure all fuses are still good and swap around a few relays as well