I was testing a 2nd version module with no box. I use a gelled electrolyte battery for the testing, sort of a mini-Optima. These batteries can deliver hundreds of amps for a few seconds when they have to.

So, I hook up all of the test leads (unlike in the X there are no fuses here) and I'm ready to rock. Except I hooked up the test leads wrong.

The first thing the module is supposed to do when power is applied is start a wipe. The first thing this mis-wired one did was to try to pass 100 amps through the output transistor, which instantly exploded. Nothing nuclear, but kind of like a small firecracker.

This sort of thing happens all the time in my business (at work and at home). My wife and kids no longer notice the smaller bangs. Don't worry because nobody will get this particular module. It can't happen in your Xterra either because everything is fused.