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Finally got around to getting this fixed. Took the pressure switch out, cleaned it, blew it out with some air, and cleaned the two plugs/connections. Worked like a charm. Now the buzzer and light work. Close quarters in there! Thanks for all the suggestions.

Ok an update. I finally got around to getting a replacement air buzzer. I plugged it in and at least the replacement doesn't cause the low air light to go out. But the buzzer did not work. I put a meter on the wire that goes to the buzzer. The meter reads 24V until the truck builds 60PSI as it...

Also, is the A3 buzzer different from the A2? I will get a replacement, plug it in and see waht happens....

Update Thanks for the suggestions so far! I unplugged the buzzer and the light now works when less than 60psi of air is present. Turns off with more than 60psi. Does that mean the buzzer is bad? Maybe causing the light to short out when it's plugged in?

I have been searching the forum and TM's all morning :) Looking for a little added advice. My truck will reach 120 PSI quickly and maintain pressure during driving. I have not found any air leaks, etc. so far. When I start the truck and the pressure is below 60 PSI the light and buzzer do not...