TM 5-3895-382-24 Start Relay Tests If the engine does not start, perform these tests in order to find any fault of the start relay. Table 31 Tools Needed 6V-7070 Digital Multimeter 1 8S-4627 Test Light 1 9G-4368 Relay Illustration 107 9G-4368 Relay. The following test is with battery current: 1. Put  the  multimeter  on  the  200  ohm  scale.    Turn  the ignition switch to the ON position. 2. Put the multimeter leads on the "C1" and "C2" terminals. The  resistance  across  the  leads  (1)  should  be  zero ohms. If  the  resistance  is   not  zero,  the  start  relay  must  be replaced. The following test is with no battery current: 1. Disconnect the wires from the "W1" and "W2" terminals of the start relay. 2. Put   the   multimeter   leads   on   each   "W1   "   and   "W2" terminal.    The  resistance  across  the  leads  (2)  should measure 15 1 ohms. If the resistance is not correct, replace the start relay. 3. If the resistance is correct, disconnect the "C1" and "C2" terminals.    Use  the   8S-4627  Test  Light  between  the "C1" and "C2" terminals.  The test light should not turn on.  Then, move the probe of the test light from the "C2" terminal to the "C4" terminal.  The test light should not turn on. If  the  test  light  turns  on  for  either  test,  the  star  relay must be replaced. 4. If the start relay is not defective, refer to Troubleshooting for other tests of the starting system. 069-5466 Relay Illustration 108 069-5466 Relay. The following test is performed with battery current: 1. Put  the  multimeter  on  the  200  ohm  scale.    Turn  the ignition switch for the engine to the ON position. 2. Put  the  multimeter  leads  on  the  terminals  "4"  and  "7". Put the multimeter leads on the terminals "6" and "9". The resistance must be zero ohms across both sets of terminals. If  the  resistance  is  not  zero,  the  start  relay  must  be replaced. The following test is with no battery current. 1. Disconnect the wires from the "A" and "B" terminals of the start relay. 6-104