TM 9-2320-360-20-1 WARNING Jewelry can catch on equipment and cause injury or short across electrical circuit and cause severe bums or electrical shock.  Remove rings, bracelets, watches, necklaces, and any other jewelry before working around HET Tractor. CTIS WIRE HARNESS CONTINUITY TEST (1) Disconnect CTIS wire harness connector from power manifold (2) Disconnect CTIS wire harness connector from controller. NOTE Pay special attention to position 7 and position 1. (3) Place positive (+) probe of multimeter on position 1 of connector at controller end. (4) Place negative (-) probe of multimeter on position 1 of connector at power manifold end and check multimeter for continuity. (5) Repeat steps (3) and (4) for remaining positions 2 thru 10. (6) Install CTIS wire harness connectors back on power manifold and controller. INFLATION VALVE VOLTAGE TEST (1) Disconnect inflation valve connector from power manifold. (2) Place positive (+) probe of multimeter on inflation valve connector, position 2 (3) Place negative (-) probe of multimeter on known good ground (4) Turn engine switch to ON position (TM 9-2320-360-10) (5) Move CTIS switch to ON position (TM 9-2320-360-10) NOTE It is normal for voltage to fluctuate. (6) Press START button and look for 22-28 volts on multimeter (7) Turn engine switch to OFF position (TM 9-2320-360-10). (8) Connect inflation valve connector to power manifold INFLATION VALVE SOLENOID COIL TEST (1) Remove connector from inflation valve solenoid (2) Place positive probe (+) of multimeter on inflation valve solenoid pin 1. (3) Place negative probe (-) of multimeter on inflation valve solenoid pin 2 and look for 23-28 ohms on multimeter. (4) Install connector on inflation valve solenoid. Change 1  2-851.8