Battery Drain - Ground Problem? 2013 Hurricane FunDeck 226

[leifferd]

Loving our new Hurricane but have just one issue... The main cranking battery drains after just a few hours. Here's the symptoms:
- The main cranking battery (which also runs all accessories) will die after just a few hours. A new replacement battery is doing the same thing.
- The fuel gauge will read empty unless you turn on the nav lights switch - then it will peg to full even if it's not full. The fuel sending unit ohm measurements indicate the sending unit is working fine.
- The horn only emits a weak wimper.

Feeling like a ground issue, but I'm not sure how to track this down. I do not have a grounding bar on this year model boat and this wiring harness under the helm is a nightmare that just bundles together and disappears under the deck. I appreciate any thoughts or suggestions!

 

[kmarine]

how to look for short in electrical system. turn off all accessories. remove ground cable from battery place test light or multimeter between ground cable and battery. see if light or meter is running. pull or replace fuses or circuit breakers until short is found. this can include alternator and other accessories which may not be fused. happy hunting. this takes time. most likely offenders. stereo and amps, depthfinders. referigerators ,windlass. Alternator diodes.