Thanks everyone.

Ty, I was hopeing that a combine operator could push the "red light" and the sound would quit, then RED light would go "OFF" after grain tank was empty. (Reset itself, basically) I don't think those indicators work like that = constant sound, until grain tank got emptied, IF wired directly to 12 volts without a switch.


I reread your post, and that must be why you attached the "power/12 volt" at the combine's electric feederhouse clutch = combine operator would have to disengage header/feederhouse, to "silence" the audible sound. Forcing him to STOP combining !    [= That is want I want to encourage.] 


I put two 12 volt units into my Amazon wish list.