Every electrical component has a voltage range within which it can safely operate. The possibility exists that a voltage spike could damage any electrical component present on your Dakota, but I would have to suspect that with as many things as you have replaced, things like the battery would have been damaged had an electrical spike been involved. Then again, one never knows what the tolerance voltage level might be for each electrical component, nor how long, or high of voltage a damaging voltage spike may have been or lasted.
I'd check this one off as a pretty wild possibility, but then again, this whole deal falls into the wild possibility situation. I've owned several Dakotas and maybe its been my fortune not to have experienced all the trouble you have experienced. My apologies go out for all the trouble you have experienced with this Dakota. I have no words of wisdom to offer. Sorry. Gene