TM 9-2230-275-14&P4-23. BLACKOUT STOPLIGHT REPLACEMENT (M689) (Con’t).c.ASSEMBLY I1.Insert lamp (4) in socket assembly, push in, and turn clockwise. Test lamp by turning on BLACKOUT switchin towing vehicle and depressing-brake pedal or signal-light lever.2.Install new gasket (3) and retainer lens (2) on blackout stoplight(1)d.INSTALLATION1.Secure blackout stoplight (1) with bolt (6).2.Connect attached wiring to wiring harness.housing. Secure with two bolts (5).4-53
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