Electrical proplems again!!

[71Longbed]

hello all truck was runing fine after last times grounding straps however decided to put in a cd player installed it up heard it for a while after that i turned the truck on and it ran for a bit after it shut off i thought weird then turned it back on and sure enopugh it ran a bit and turned off ok charged the battery uyp started it up in the morning again ran for a few minutes then shut off again is the alternator not recharging the batter or is the altornator not enough for my 500 amp starter? help some one plz last Topic discussed about this here http://207.44.196.117/vboard/showthr...trical+problem