Battery connected backwards
 

My daughter was messing around with one of my buggies and accidentally had the negative bullet in the positive terminal of the battery and then she touched the positive bullet to the negative terminal on the battery but didn’t push it in. She said when she touched it, heard a pop of sorts and took it apart

I’ve checked it all out and the battery checks out fine and the ESC seems fine and looks to have all functions. What/how should I check it out further? Do I need to check the external cap?

I have a feeling if you smoked the caps you'd know. I've plugged in backwards twice, no mistaking that smell.
--Alex

Sorry, what ESC?
--Alex

R1 super stock ESC

I was in the other room and heard the pop, but didn’t smell anything when I walked over

I'd guess there is a blown diode on the cap pack. Not sure how to test it other than measuring voltage across it, then plug a battery in for a moment, unplug the battery and measure again.

Thanks! I’ll check for that

For the record, my kid has touched his ESC in backwards at least a few times and luckily had no damage.

I'm running the same ESC and have done the same thing with no issues afterward.

The key is quickly recognizing what happened and unplugging it.

Sounds like your daughter was quick to realize something was wrong. Great job on her part and she should be praised because if she wasnt quick to notice, thats when problems occur.

I killed a muchmore esc doing that.

The strangest part is it died a couple days later, after some racing right in the middle of a practice run. Landed a jump and the car just lost all power and rolled into the pipe. It just partially failed and took a few days of running on turf to fully die.

I'd say if it still works you're 90% still ok. But there might be issues later, but only time will tell. Best thing to do is shorten the wires so it can't be plugged in backwards next time. Maybe put some red heat shrink on pos and red paint (fingernail polish might work well if the ladies have it) on the battery.