2018 Electrical issues - NO LOW BEAM, SIGNALS, HAZARDS, BRAKE, MIRROR OR REVERSE LIGHTS

[aratz1]

Hi I'm having a wiring issue with my 2018 Silverado 3500 L5P, - 280,000kms

 

When I left my house this morning the truck was 100%. After a 20 min drive on the highway I went to turn off and dash alerted to front and rear turn signal failure. Tried the other side and same thing. So all 4 corners turn signal failure. My indicators work on the dash but go into hyper flash and the signal does not make it to any of the lamps. Also I discovered after investigation that my low beam headlights, hazards, mirror switchbacks, reverse and brake lights all do not work either.

 

However, my running lights, high beams and fog lights DO work....

 

I have my gooseneck trailer hooked up and everything works perfectly fine with the trailer lighting. Brakes, signals, running lights, everything, all good. 

 

Only the lights on the truck do not work. Trailer works perfectly using the in truck box 7pin connector.

 

I have disconnected and load tested both batteries and they came back good, as well as cleaned all 4 posts. 

 

i have LED high and low beams, as well as LED switchbacks in the mirrors from Boost Auto.

 

Running lights And brake lights are all incandescent and all look good and work when connect to direct power outside of the housing.

 

Anyone have this issue in the past and could possibly shed some light on this for me???

 

Thank you

Edited August 27, 2024 by aratz1
Missed info