Just looking for some ideas on where to start looking for my problem. First i have a draw on my batteries. My bow light has a constant glow. Its LED, and not fully lit. If that makes any sense. Even when the batteries are turned off. And if i hit the switch to raise or lower my bolster seats my gauges go nuts jumping back and forth and my Garmin shuts off. Sounds like a ground issue to me. Any ideas?
Thanks in advance.

If the LED is still glowing when the switches are "OFF" then they (the switches) are not wired properly as it should totally disconnect the batteries all together.....but yes i would double check all you grounds as it seems you have a stray current back feeding somewhere..more then likely under the dash....i would run a separate ground wire from the battery ground to under the dash where the common ground is and see that that helps/cures anything.
Either way start checking grounds from the dash going back since that's where your getting the most "Action" from things....also make sure the connections are tight and the wires are not corroded green...that will cause resistance and give you crazy results if its not clean...