If you can post some pictures of the board where you are working that would be very helpful. Are you attempting to replace the bridge on the power supply or on the flipper power board. I sure hope you didn't get the new bridge hooked up wrong, that could be bad news.

There are two bridges mounted in the cabinet of a system 7 game, one for +28VDC solenoid power, one for +18VDC used to supply power to lamp matrix.

System7_bridge.jpg

There are 4 connections on each bridge, 2 are input marked AC. The wires to those inputs come from the transformer and do not matter if you cross them and are the same color. The other 2 are + and - voltage.

SKBPC3510-Bridge-Rectifier-Module.jpg

You need to look at your print and see what color is which wire. A pair of red wires does not seem to jive. I'll take a picture inside a BK tomorrow and post.

IIRC the orange and blue wires should be attached to the lug that is oriented at 90 degrees to the other three. This is +ve.
The black wire attaches diagonally opposite the blue/orange one. This is -ve/earth/ground depending on your terminology.
The two red wires attach to the two remaining lugs. It doesn't matter which goes on which. These are the a.c. supply.
Andy

I will go take a pictur of mine today, but yeah your two red wires if they are coming from the transformer are the AC wires and should be on opposite sides of each other. The bridge will have AC or ~ marked on it where those two go. Or at least marked on one of the AC terminals and then the other goes to the diagonally opposing side. Hopefully you didn't fry anything badly.

You have an AC wire hooked up to the plus terminal. Pull the bridge out. Test it for shorts with your DMM on diode mode. If it is still good ditch the crimp contacts and solder the wires dirrectly to the brdige. Replace the fuse (probably went if it was hooked up wrong).