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Is the blue light on the front of the ME3 suppose to always be on? I have the red (ACC) cord connected to the battery and the yellow (battery) cord connected to the U14 on the RNS-E harness... is this right?
 

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yes.. when the ME3 is OFF the blue light is ON.. it bugged me being on all the time (eventhough i couldnt see) -- which is actually the original reason i put a switch on the constant power (yellow wire), but ended up being essential to "Y" 2 things into the 1417..
 
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