1. It is possible, but jumping dead vechiles is harder on them because if they are completely dead your regulator goes wide open to charge there and it is charging your also. And if one of there batterys had a shorted cell in it that just makes yours work all the harder.
And to answer your other question yes it is possible if the battery was down at the time of restart, it again could make the regulator do the same as I dicribed before.
One thing that you can try is charge your battery fully and on the altrernator there is a big plug unplug it and let it hang over night if you battery stay up then wa-la you'll know that it was the alternator if not were back to square one but it is worth a try sorry I know you need the truck but bud i'am not there so I can only tell you what I have experanced before. 8) NOS
Thursday, March 15th, 2007 AT 6:01 PM