TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 379 of 1205
REFERENCE INFORMATION INSTRUMENTS CIRCUIT TM g-2320-387-24 -1 I PROTECnvvxcONTl?OL PRESSURE SWllCli I 670 79A & 27P 270 67 27 BRAKE WARNING LAMP Repair/replace wiring (para. 4-80). Replace brake warning lamp (para. 4-21). It is important to connect the leads as indicated because you are checking continuity across a diode. The lamp will glow dimly because you are supplying a small amount of power through STE/ICE-R. You may have to shade the lamp with your hand to see if it glows. A multimeter may not supply enough power to light the lamp. In this case, look for a much greater resistance when measuring with the leads connected in one direction than when they are connected in reverse. Replace harness or repair wiring (para. 4-80). DC VOLTAGE O-45 VOLTS STUICE-R TEST 89 1. Connect RED clip to the indicated test point, BLACK dip to negative or ground. 2. Start Test 89. DC Volts. 3. Displayed reading is in volts. BAlTERY VOLTAGE MULTlMETER 1. Set the voltmeter to a DC volts scale of at least 40 volts. 2. Connect the RED lead to positive and the BLACK lead to negative. 3. Be sure to read the correct scale. RESISTANCE AND CONTINUITY 04,500 OHMS STE/lCE-R TEST 91 1. Connect RED clip and BLACK clip to the indicated terminals in the question. RED to the first, BLACK to the second. 2. Start Test 91,0-4,500 Ohms. 3. Displayed reading is in ohms. Less than 5 ohm is continuity. If the resistance is over 4.500 ohms, STE/tCE-R displays .9.9.9.9. S CONTINUITY (RESISTANCE) MULTIMETER 1. Set the voltmeter to an ohms scale of about 1,000 ohms. 2. Connect the RED and BLACK leads to the connections stated in the question. 3. Be sure to read the correct scale. Less than 5 ohms indicates continuity. For an open circuit, the meter should peg full scale (needle all the way to the left). 2-325