Our is a non ddec the wires are located on the back side of the valve covers one on each side have to use a mirror on a stick to see them. one is dark blue-black? other is yellow if you dont have a three way (low-off-high) or dual switch (on -off / low-high) even with ddec you are probably running only low according to the wiring diagram. having it set to run only high would be dangerous in bad weather. Brian
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87 Newell Tag 40'-8v92TA-HT740 #139
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