Rocker switch warning icon not lighting

hi everyone. I have a 2003 379 pulling an east dump trailer. I have my dump valve for my trailer suspension tapped into my rocker switch hot line. Recently I have lost all the little green lights that warn you that the switch is in use and when I apply the dump valve, it no longer activates the trailer. Tractor works fine, air over air, trailer is electric over air. Any ideas? Maybe change that section of harness?

 

Hi 89. Thanks for the comeback. I've pulled that panel off and checked those wires so many times, I'm surprised they're still intact. Each plug has 4 wires to it. One hot, one ground, one switch light, and one to the green light, which indicates the switch is in use.the switch light works when my running lights are on so that tells me that plus the ground are working. I think there may be a problem in the harness since that's all that works on all 4 rockers.

 

Thanks again 89. All the little green icons are not lighting up. I guess I'll have to take my time and follow the wires back to where it's hot and replace what's bad. I'll let you know what I find

 

Just talked to a friend of mine who is in the scrap business about my problem who just happened to have a similar problem. He recommended checking the fuses. He said fuses are made of aluminum and aluminum contains zinc for strength. After a while the zinc bleeds out of the aluminum and causes oxidation.i changed every plastic coated fuse and low and behold, I got everything back, lights, gauges, everything functions normally. Happy days.