Now we can guesstimate much better!
So it shows the K1 relay receives power on pin #8 on the J4 accessory plug.
Check that to ground for voltage. Also check the chassis battery terminal lower left for 12V, this ensures there is power to this panel and a good check that the meter works!
BTW, what is it that is 'spose to pick up the relay (apply power to pin #8)? I am guessing that there is no 12V here, cuz you said the LED did not light up either.
EDIT: looking at it some more, "Accessory" would be on when the key is "on" (unit running).
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