Break light issue and trailer brake

By Rackmaster
July 18, 2020 in Duramax Diesel & 8.1L Big Block

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Rackmaster

Posted July 18, 2020

2014 2500 hd diesel the e trailer break not working and brake light on truck does not come on unless switch is on

all fuse good

I disconnected pigtail for goose neck , plugged direct into bumper outlet as original still not working ( I had a bad harness one time for gn

)

i noticed the brake lights on truck will will not come on when petal is pushed unless the ignition switch is on

so something on trailer brake harness causing a short or ?

All other leads work on trailer and truck .

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