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post #1 of Old 02-15-2014 Thread Starter
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Autopilot install with a switch

I got an used autopilot for my Catalina 27 (wheel). I don't have a dedicated switch on my fuse panel for my instruments. I will add that in the near future when I replace the non working depth and speed. Today I installed the autopilot and wanted to put it on a switch in the cockpit. I have attached a photo of the switch. I am running directly from the battery to the switch, then off the switch to the control head, with a fuse inline. I connected the negative to the battery and then connected the positive. All worked as it should, except I realized the switch was in the on position. I flipped the switch off and went to put the positive back on and it created a large spark. It then removed the negative, installed the positive and tried to install the negative and had the same issue. The ring terminal even tried to weld to the battery post.

What am I doing wrong?
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