Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

BB_TX · 02-01-2023, 10:17 AM

As a side note, the red blown fuse indicator will not illuminate unless there is some device currently connected to that fuse. The LED requires a path to ground to light up, and that path is thru the connected device. When the fuse is good there is no voltage difference across the LED and it does not light up. When the fuse is blown there is a voltage difference across the LED (and hence current flow thru it) and it does light up.

02-01-2023, 10:17 AM	#5
BB_TX Montana Master Join Date: Oct 2006 Location: McKinney Posts: 7,200 M.O.C. #6433	As a side note, the red blown fuse indicator will not illuminate unless there is some device currently connected to that fuse. The LED requires a path to ground to light up, and that path is thru the connected device. When the fuse is good there is no voltage difference across the LED and it does not light up. When the fuse is blown there is a voltage difference across the LED (and hence current flow thru it) and it does light up. __________________ Bill & Patricia Riley, our Golden 2007 3075RL (recently sold, currently without)