93 cummins no gages, no wait light
 

Hey guys, my son and have a 93 cumming. Last week I get in it turn the and nothing. No Gage's no wait light no windows nothing but head light horn lock any ideas. Already replace ecm.

Cable from battery
 

There is a cable coming from battery it fairly heavy and has triangle shaped end with several other wires coming out of it. Does anyone know what it is. Two of the wires are broken.