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Running light stays on?

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We had a random torrential downpour and my SM was out in it uncovered. Tonight I realized that the running light was on in the DRC Edge, WITHOUT THE KEY. The brake light won't activate until key is on. Thinking it is a switch, I unplug the front and rear, and still its still on. I ran out of light so I just unplugged the main connector to the light under the seat. Any help? Is there another connector or relay I can check?

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The tail light is powered thru the ignition switch. When ON power is routed back thru the switch to power the brown wire. In the PARK position the brown wire is connected direct to the red wire.  So what happens when the switch gets wet is the water cross talks red to brown and powers the tail light.  This only happens with LED tail lights because they draw so little power the cross connection of water in the switch is enough to light the LED.  When the switch drys out, the tail light will go off.

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