Electrical issue exorcism

I think have a short somewhere on my house circuit, specifically my dash panel wiper and nav light circuits. Anyone have any insight to resolving this. How should I use an ohm meter to find what I presume is a cross connection of two frayed wires? I have access to the rear of the dash panel. There are no obvious live wires dangling from the back of the dash panel.


Action Outcome

turn on most dash switchesnormal results, switches supply power as usual
no gremlin
turn on navigation lightsnav lights come on
all gauges (i.e. Mercruiser temp, oil, fuel, rpm, battery, temp) all go to 110%
all other circuits on on the panel go dead
cannot shut off the main engine
turn on wipersnav lights come on (yes, nav lights come on, not wipers!)
all gauges (i.e. Mercruiser temp, oil, fuel, rpm, battery, temp etc.) all go to 110%
all other circuits on on the panel go dead
cannot shut off the main engine

Thoughts/questions:
-Most(?) gauges read 100% when the encounter no resistance, right? So if all gauges are all pegged at 110%
-the issue was intermittent initially, but became more frequent, often happens in rough water (jarring)
-my main engine always starts and runs fine during the dash malfunction
Call Jordan at JC Marine Electrical.
He’s mobile as well.
250-927-5892
 
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