Andy, The Super C I purchased had a break in the wire running from the switch to the coil under the battery box which is one possibility. If you have a voltmeter you can start checking the entire circuit from the battery through the switch to the distributor. I am mostly a letter series Farmall guy with tractors older then your 656 but the switch on your tractor I believe is more then the push - pull switch of the earlier tractors. You should check at the switch for voltage and then see if you have voltage coming out of the switch as the switch could be the bad component. From there if you have voltage from the switch check at the coil and make sure it is making it that far. If not you will need to check the wiring and whatever electrical devices are in the circuit for continuity as well. I wish I had some 656 experience to share but I'm just going on the tractors I'm familiar with which are pre-656 models. Someone who is more familiar with the later models will chime in on your thread as there are several of us on this forum wanting to help you through this, Hal.
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