Truck is a 93 f150 5spd 5.0 So coming home today i shifted into Neutral while coming up the off ramp and the truck completely dies.. i waited until i was at 15mph shifted to second popped the clutch off i went got a code 67?? Also i notice when im sitting at a stop if i turn the heater on it will kill the truck.. Suggestions?

 

check your alternator output with a multimeter.
clean your battery connections and make sure that the cables are in good condition.

 

Both are brand new and the belt is tight but ill check em anyways....theres something else amiss because when you shift to neutral it just kills it.