Blowing fuse on running lights

[rjames]

I have a 1999 Maxum 2800 SCR and when I turn on the switch to the running lights, the fuse instantly blows out. They worked fine until I did some work on the boat, and one of the things I did was open the dash, to run a transducer cable and figure I must have unplugged something or pulled on a wrong wire. If I only turn on the back mooring light, the fuse does not burn out, but as soon as I turn on the front lights it instantly blows. I notice on the switch there are 2 plugs that have nothing on them and I also noticed I have a red and black wire under the dash that are not plugged into anything? How do I begin looking for the problem? Attached is a photo of the inside of the switch showing two empty wire ports.

Any help is appreciated.

[mmwjr]

I am assuming you must have installed a ground wire on the terminal for the nav light. Disconnect all black wires but note there current location. Then install one at a time until the fuse blows. This will tell you what is wrong.

Get the wiring diagram from the manual located on the Document tab.

[Skip R Maxum]

What was the fuse amp rating? Is it the correct rating ?

What other work was done?