Yamaha 50TLR w/ 703 Remote Controls won't start; Am I missing connections?

dbachelor

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May 6, 2011
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I just picked up a barely-used 2006 Yamaha 50TLR (2-stroke with power tilt/trim) and swapped out the 704 control it came with for a 703 control. The 10-pin harness plugged straight into the motor, and I thought that was it for necessary connections; however when I hooked up a battery and turned the key-- nothing happened (dead-man lanyard was on).

There are two bundles of leads coming out of the control box, but I thought they were for optional gauges. Are there other connections that are necessary to make the motor operate? The motor came with a Tachometer, which I believe is what one of the wire bundles is intended for--I haven't hooked it up yet (and wouldn't think it is necessary to complete the starting circuit!); what is the other bundle for? There are 6 wires paired into three connectors.

Thanks a lot for the help!
 
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