Hey brother. Just wanted to say your videos have been very helpful. Did have much experience with oil furnaces but with your videos I was able to get the concept well
ideally, you'd put the jump pack on and let it charge the vehicle battery for a while before trying to start it. key/lights off/out doors closed and wait 10+ minutes. that's assuming the battery is able to take a charge, so if it's flat dead and wont hold any charge, then not many jump packs will be able to start them on their own, especially a newer vehicle full of electronics and large/high compression engine. not judging the silly little jump starter either way.
Was the vehicle battery between 2-8v requiring the two button Force Start? I see you used that mode but perhaps it won't force start outside that range? It would be interesting to know if the jump box was outputting voltage during the force start mode?
Gotta give your starter a wack to dislodge the soot and carbon build up from the brushes ect n try again......... ofcourse clean tight cables !!! 😂 oh yeah looks like a Ram never mind................jk 😊