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My, where did you get so smart? :beer: Chris is exactly right. Not only does this help you determine the proper polarity, but it also is a good check for your MX-7777, lets you know it is working if it trips when the polarity is reversed.

the cable I had and cut to hook to the batteries you could connect the one end in the back of the Mx-7777 and the other end would plug into and screw down on the two power outputs on the Mx-7777.

I'm pretty sure that's the cable, if you open up the battery box the yellow tag is on the cable still and you can get the number off it. That's why I offered, so we can talk and listen to tunes on the recovery. :wink: I'm smarter than the average bear...

That's what I had to do. Chris, my a-1780 box isn't working anyway, just steal my wiring off the 109 and get yours up and running. I doubt I will figure out what's wrong with mine before Haspin anyway. :cry: