BF150 won't start

[Brisa]

2007 BF150 dual batteries. I'm a dumb ass. Crossed my battery wires and turned on selector switch. Installed new switch. Had batteries charged and tested both good. Cleaned connections. Checked all fuses and all good. Turned on batteries and all electronics work. Turned key on and gauges work but nothing no lights or beeps but when turning key off the usual roaring sound is heard which always happens when shutting down and I'm told is normal.
Any help is much appreciated

 

[Deuxgrenouilles]

Could be a loose or not connected ground wire…

 

[Brisa]

Could be a loose or not connected ground wire…

Thanks for reply. Made sure all connections were secure but my next thought is test wires for continuity. I was told maybe rectifier or main relay??

 

[Brisa]

Just adding to my issue. I also have no power to my trim. I was hoping hondadude or someone of his caliper can help.

 

[HonDan]

Check one of the fuses think its red 10 amp on the engine. Did same thing once, and had same result you have fuse took the hit.

 

[Brisa]

Checked all fuses for continuity and all good. Looks like I need to trailer it 2hrs to repair shop

 

[HonDan]

Did you test for continuity on the fuel pump fuse not just look to see if it was burnt?

 

[iang6766]

Check your 90amp fuse, if you reversed polarity it will blow

 

[Jimmy Robichaud]

Those two positive battery cables ,the big one and the small one, coming from your switch ,make sure you have battery power on the small one where it connects at the fuse box.

 

[Brisa]

Did you test for continuity on the fuel pump fuse not just look to see if it was burnt?

Yes continuity good thanks

 

[Brisa]

Check your 90amp fuse, if you reversed polarity it will blow

90 amp fuse good thanks

 

[Brisa]

Those two positive battery cables ,the big one and the small one, coming from your switch ,make sure you have battery power on the small one where it connects at the fuse box.

Thanks I'll check it