Sentra L4-1.8L (QG18DE) (2004)
Hazard Warning Flasher: Testing and Inspection
Electrical Components Inspection
COMBINATION FLASHER UNIT CHECK
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Before checking, ensure that bulbs meet specifications.
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Connect a battery and test lamp to the combination flasher unit, as shown. Combination flasher unit is properly functioning if it blinks when power
is supplied to the circuit.