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Check Horn Operation

DIAGNOSIS PROCEDURE CHART

Step Check Yes No
1 CHECK HORN OPERATION. 
Make sure the horn sounds when the horn switch is pushed.		 Does the horn sound? Go to step 2.  Check the horn circuit. Ref. to GENERAL DESCRIPTION .
2 CHECK HORN OPERATION. 
  1. Disconnect the harness connector of body integrated unit.
  2. Connect the harness connector terminal to ground using a suitable lead wire.

    Connector & terminal 

    (B280) No. 11 (+) - Chassis ground (-): 

 Does the horn sound? Check the body integrated unit. Ref. to BASIC DIAGNOSTIC PROCEDURE . Check the harness for open circuits and/or shorts between the body integrated unit and horn relay.
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