2002 Explorer Horn System Diagnosis

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

9.90

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Horn: Testing and Inspection Initial Inspection 1. Verify the customer concern by operating the horn.

Visual Inspection Chart 2. Visually inspect for obvious signs of mechanical and electrical damage. 3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. 4. If the concern remains after the inspection, connect the diagnostic tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If diagnostic tool does not communicate with the vehicle: ^ check that the program card is correctly installed. ^ check the connections to the vehicle. ^ check the ignition switch position. 5. If diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual. 6. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with: ^ CKT930, CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network (Information Bus). ^ NO RESP/NOT EQUIP for central security module, go to Multifunction Electronic Control Module codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the central security module. 7. If the DTCs retrieved are related to the concern, go to central security module Diagnostic Trouble Code (DTC) Index to continue diagnostics. 8. If DTCs are retrieved that are not found in the following central security module Diagnostic Trouble Code (DTC) Index, refer to the master central security module Diagnostics Trouble Code (DTC) index in Multifunction Electronic Control Module (General Module). 9. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. See: Diagnosis By Symptom

Test A: Horn(s) Does Not Sound

2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A1 - A2

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A3 - A5

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A5 - A7

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A7 - A8

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A9 - A10

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A11 - A12

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A12 - A14

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

A14

Test B: Horns Sound Continuously

B1 - B2

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

B2 - B4

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

B5 - B6

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2002 Ford Truck Explorer 4WD V6-4.0L VIN E

Copyright © 2008, ALLDATA

Symptom Chart

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