Solved

[TitanMike]

Hi Guy’s, 800 in a Titan, battery installed backwards now nothing. Checked all fuses, relays and diodes in fuse box, none were blown. Any pointers appreciated!!
Is it normal to have no continuity on battery leads with battery disconnected. Also have a critical power test plug and have no power, circuit and to ground, and no continuity with battery disconnected.
Mike

 

[TitanMike]

Second positive lead had fallen down behind corner of tank, all good now.

 

[MrSled]

Nice catch..