IMPORTANT NOTICE
As you prepare to attach the positive (red) and negative (yellow or black wires)
to the batteries there will be brief low power spark that is generated as you
make the connection. This is due to the high frequency capacitors taking a charge.
Make sure the (black or yellow) wires are connected as illustrated to the
negative side of the battery and the red wires are connected to the positive


This sparking is what happened to me and I found this in the manual. So I hope the diode in the rectifier is fine, because i have NO IDEA what you are talking about........Just remember bill, we all don't have ur knowledge.....Heck, I make gasoline for a living