you are trying to force the electrons to go the wrong direction. damageif you reverse the polarity of the charger to the battery, the battery may explode. suspect what happened in your case is that when you hooked up a dead or very weak battery to a good one, backwards as you said, the good battery "won" and forced the bad battery to a negative voltage. when this happens, you will have to buy a replacement battery., don't get creative in hooking up jumper cables, put red on positive and black on negative. the chargerwhen you connect the cables directly to the battery, it may damage the charging system in addition to the battery. the homeentertainmentwhat damage is caused by incorrectly hooking up the battery charger ca. could very much be possible that you messed up your throttle body, could have shorted something out if its electronic, which it most likely is, or worse you could have shorted something out in the cars ecu/computer.
What happens when you Jump Start your car the WRONG WAY
Electrical - Can hooking up jumper cables incorrectly cause one to
if you connect the red cable to the negative terminal and the black cable to the positive terminal, several problems may result. damage is caused by incorrectly hooking up the battery charger cables? at least with non computerized vehicles the worst that would happen is the jumper cables would melt! if your mechanic has been trustworthy to you thus far, there is no reason to doubt him this time. During the process of charging the battery, you may accidentally mix up the cables and. when this happens, it could damage the battery as well as other associated electrical components. when a battery is damaged, you need to dispose of it properly, as it could leak acid. you called any other shops to see what they would charge for the same job?