ENGINE GLOW PLUGS 5.5 Testing the Glow Plugs Glow plug location Before performing any test on the glow plugs be sure to disconnect the ground wire from the battery. Connecting bar TEST 1: GLOW PLUGS. NOTE: Each glow plug is to be checked individually. Remove the connecting bar between each glow plug before testing. With the ignition switch off, connect one end of the ohm- meter lead to the glow plug terminal and the other lead end to a clean ground. A reading of 0.9 ~ 1.2 ohms is normal. An infinite or “0” reading means the glow plug is defec- tive and must be replaced. C2480 TEST 2: IGNITION SWITCH to GLOW PLUGS. Remove the bolts retaining the dash panel. (fig.
C2939, C2462) With the ignition switch off, disconnect the red / white wire from ignition terminal 19. Connect one ohm- meter lead to the terminal marked 19 on the ignition switch and the other lead to the red / white wire. Low to “0” reading means good continuity. High reading means the red / white wire from the ignition switch to the manifold heater is defective. Mounting screws 5 TEST 3: IGNITION SWITCH “HEAT” POSITION. Connect the ohmmeter leads between the terminals marked 30 and 19 on the ignition switch. (fig. C300) Turn the ignition switch to the “HEAT” position and observe the ohmmeter readings. Low resistance reading normal. High resistance reading, replace the ignition switch.
C2939 Ignition switch C2462 Pre-Heat Indicator Ignition switch Check the ignition switch terminals 17 and 19 with an ohmmeter. If there is good continuity between the two terminals the bulb or wiring is bad on the pre-heat indica- tor light. To change the indicator bulb, remove the bolts retaining the dash panel to the ROPS. Select the proper bulb, twist and pull the socket and bulb assembly bulb from the dash panel. Replace the mini bulb and or the socket assembly. C300 5-12