I have 3 amps setup in my boat now. Last year i just had 2 and ran them off the same battery as the boat ignition. Now I am going to a 3 amp set up. I have it all wired up and it sounds great. When i hook the amps up to the same battery as the ignition all is well and the music goes on. When i hook the ignition up to a separate battery from the amps 1 amp won't work. The other 2 work great. The one that won't lights up the "thermal" light. It is a rockford fosgate amp if that makes any difference. The other two are MTX and Kicker. Any ideas?
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