Looking for help with my breather lights. I installed and wired up my breather lights on my truck about 6 months ago. Everything has worked great. Went to wire up a mirror dual faced light today and was going to tie into the breather lights. I must have wired the lights backwards and lost my breather lights. I’ve searched the truck up and down for a fuse or relay. Can’t find anything. Any help is greatly appreciated
2005 Peterbilt 379 breather light problems
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Morristhompson5, Mar 8, 2021.
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LEDs only work with power on one side. Did you change that?
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Possibly your issue is a connection having moisture/corrosion in it. Cut the wire if you hard wired it and look for a greenish corrosion. It doesn’t take much corrosion to effect the performance of LED’s. On my 389 that fuse is under the hood and not the floorboard box in the cab. The factory plugs on mine corroded after a couple years so I cut them out and hardwired them with heat shrink around the connections and haven’t had an issue with them since.
Last edited: Mar 8, 2021
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