I bought my 50005 several months ago and just got around to installing it. Turned out that the pink and yellow wires were switched around in the factory wired relay/fuse block causing all sorts of problems which were only diagnosed when I pulled the relay/fuse box out and saw the problem right in front of me.

Of course when I called tech support they thought it must be a wiring problem on my end when the fuel pump came on with the ignition, and the MSD box would only light up when the fuel pump switch was thrown

Finally got it figured out and fixed. Just wanted to add this to the thread in case someone else stumbles across the same problem. Unfortunately my first experience with Painless wasn't

Might be a good idea to build a test setup so that the factory wiring can be verified before shipment.