i don't profess to be an electrical engineer. i have no theories involving flux capacitors or the relativity. i simply remember when i was about 7 years old and coming home from school and seeing my neighbor laying on the floor of his buick. i didn't know then he was dead. my dad explained it to me after the ambulance and coroners wagon left.
maybe the guy had a bad heart, i dunno. maybe it wasn't the shock but the surprise of the shock that killed the guy. again i have no idea. i DO think a measure of caution is in order, and to minimize any form of danger ain't exactly responsible. then there's the fact that unless you don't know how to fix something, and have no idea how it works, then about all a person can do is mess it up worse, and make the repair more expensive, or make it not repairable. personally, when the coe is finished, it won't be bone stock, but i understand those who are building museum quality trucks. they are almost a form of art that can be driven. to that end, consider how hard it might be to find an exact replacement that is in good working order for your truck, and ask yourself if it's worth messing with, or using for your next science fair exibit.
do what ya want. it is after all, yours. personally i will send my electronic stuff to someone who is trained. that would not be me. as uneducated and ignorant as i am, i have figured that out. the image of the dead guy is still an image i can recall 46 years later.
strange really, considering i can't remember to pick up a gallon of milk on the way home from work.