TM 9-2320-365-20-12-521OPERATIONAL TESTCONTINUITY TEST(1) Position main light switch to SER DRIVE(TM 9-2320-365-10).(2) Position headlight low beams to on(TM 9-2320-365-10).(3) If both headlight low beams do not illuminate,go to step 3 of this fault.(4) Position main light switch to OFF(TM 9-2320-365-10).(1) Remove three screws and retaining ring fromhousing.(2) Remove lamp from housing.(3) Disconnect headlight lamp wire 18 fromhousing.(4) Disconnect headlight lamp wire 91 fromhousing.(5) Set multimeter to ohms.(6) Connect positive (+) probe of multimeter toheadlight lamp wire 18.(7) Connect negative (-) probe of multimeter toheadlight lamp wire 91 and note reading onmultimeter.(8) If continuity is not present, replace headlightlamp (para 7-34).(9) If continuity is present, repair wire 18(para 2-40) or replace front lights cableassembly (para 7-74).(10) Connect headlight lamp wire 18 to housing.(11) Connect headlight lamp wire 91 to housing.(12) Install lamp in housing.(13) Install retaining ring on housing with threescrews.
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