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Horn relay where is it located - 2007 Mercury Mariner

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Could have DTC"S
B1217 Horn Relay Coil Circuit Failure SJB REFER to Section 413-06 . B1218 Horn Relay Coil Circuit Short to Battery SJB REFER to Section 413-06 .
If the relay had a problem a DTC would be set .
PINPOINT TEST B: THE HORN IS ALWAYS ON Test Step Result / Action to Take B1 CHECK THE HORN SWITCH

  • Remove the driver air bag. Refer to Section 501-20B .
  • Does the horn continue to sound?
Yes
GO to B2 .

No
INSTALL a new driver air bag. REFER to Section 501-20B . TEST the system for normal operation. B2 CHECK THE HORN SWITCH HARNESS FOR A SHORT TO GROUND
  • Key in OFF position.
  • Disconnect: Horn Switch Harness.
  • Key in ON position.
  • Does the horn continue to sound?
Yes
GO to B3 .

No
REPAIR or INSTALL a new horn switch harness as necessary. INSTALL the driver air bag. REFER to Section 501-20B . TEST the system for normal operation. B3 CHECK THE CLOCKSPRING
  • Key in OFF position.
  • Disconnect: Clockspring C218a.
  • Key in ON position.
  • Does the horn continue to sound?
Yes
GO to B4 .

No
INSTALL a new clockspring. REFER to Section 501-20B . TEST the system for normal operation. B4 CHECK CIRCUIT 6 (YE/LG) FOR A SHORT TO GROUND
  • Key in OFF position.
  • Disconnect: Smart Junction Box (SJB) C2280a.
  • Key in ON position.
  • Does the horn continue to sound?
Yes
GO to B5 .

No
REPAIR the circuit. TEST the system for normal operation. B5 CHECK CIRCUIT 1 (DB) FOR A SHORT TO VOLTAGE
  • Key in OFF position.
  • Install the driver air bag. Refer to Section 501-20B .
  • Disconnect: SJB C2280b.
  • Key in ON position.
  • Does the horn continue to sound?
Yes
REPAIR the circuit. TEST the system for normal operation.

No
GO to B6 . B6 CHECK FOR CORRECT SJB OPERATION
  • Disconnect all the SJB connectors.
  • Check for:
    • corrosion
    • pushed-out pins
  • Connect all the SJB connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present?
Yes
INSTALL a new SJB. REFER to Section 419-10 . CLEAR the DTCs. REPEAT the self-test.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

Posted on Dec 26, 2016

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