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HELLO, I'M JUST TRYING TO MAKE CONTACT WITH A QUESTION ABOUT TRUCKS WITH AIR BRAKES. THERE SEEM TO ALWAYS BE COLORED AIR LINES, 4 - 5 COLORS. ARE THERE ANY GUIDELINES AS TO WHERE EACH COLOR GOES OR A COMMON UNIVERSAL PURPOSE FOR EACH COLOR? IF EACH COLOR DOESN'T SERVE A SPECIFIC PURPOSE, THIS IS VER...
HELLO, I'M JUST TRYING TO MAKE CONTACT WITH A QUESTION ABOUT TRUCKS WITH AIR BRAKES. THERE SEEM TO ALWAYS BE COLORED AIR LINES, 4 - 5 COLORS. ARE THERE ANY GUIDELINES AS TO WHERE EACH COLOR GOES OR A COMMON UNIVERSAL PURPOSE FOR EACH COLOR? IF EACH COLOR DOESN'T SERVE A SPECIFIC PURPOSE, THIS IS VER...