DocPA
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I have a 90 M931A2 was a rebuild. There are 2 modules that I'm guessing control the lights and buzzer for the parking brake and low air. There is (1) on the driver side kick panel right by the fresh air door with a 3 prong plug. There is a second on the inside firewall driver side just to the left of the bottom of the steering column with a plug with many prongs. Which is which, anyone know. And please refrain telling me to look at TM's or smart answers. I looked at the tm's and I get all the smart answers I can digest from my wife. I have no lights or buzzer. And yes I checked and cleaned all the grounds and checked the low pressure switches and bulbs. Thanks in advance for any help. Doc