TM-9-2320-209-20-2-1 Troubleshooting Part 1 for M44A1 and M44A2 Series Trucks
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TM 9-2320-209-20-2-1 GO — h NOTE You now know that high beam and Iow beam voltage is reaching both lead lamp assemblies. This means the trouble is in both head lamp assemblies n 9 I 1 ● Go to step 17 I I I I ● Check wiring harness between dimmer switch and headlights ● ● ● ● ● Take off leads 17 and 18 contacts from dimmer switch. Refer to Vol 3, chapter 7, para 7-65 Put multimeter + lead on lead 18 contact of dimmer switch. Put multimeter - lead on a good ground Read multimeter. Multimeter should read +24 volts DC. If not, press down on dimmer switch and read multimeter again Put multimeter + lead on lead 17 contact Press down on dimmer switch and read multimeter again Does mu I timeter measure less than +24 VOI ts DC at either or both leads 17 and 18 contacts? b r LE/iD 18 CONTACT /3 GO TA 114281 25-74 Figure 25-7 (Sheet 4 of 11)