SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSSUBARU2010OUTBACK R PREMIUMREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 103 (SECURITY AND LOCKS)SECURITY SYSTEMINSPECTIONCHECK HORN
2010 Subaru Outback R Premium

Check Horn

2010 Subaru Outback R PremiumSECTION Check Horn
WARNING: This page is about a different car, the 2012 Subaru Outback and 2012 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Step Check Yes No
1 CHECK HORN OPERATION. 
Check the horn sounds when the horn switch is pushed.		 Does the horn sound? Go to step 2.  Check the horn circuit.
2 CHECK OUTPUT TO HORN RELAY. 
  1. Connect the Subaru Select Monitor Kit.
  2. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor".
  3. On << System Selection Menu >> display, select {Integ. unit mode}.
  4. Select {Function check}.
  5. Select {Horn Output} and execute.
 Does the horn sound? Horn circuit is OK. Go to step 3  .
3 CHECK HORN RELAY CIRCUIT. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the body integrated unit connector.
  3. Remove the horn relay.
  4. Measure the resistance between body integrated unit connector and horn relay.

    Connector & terminal 

    (B280) No. 24 - Horn relay No. 4: 

 Is the resistance less than 10 Ω? Check body integrated unit. Refer to BASIC DIAGNOSTIC PROCEDURE . Repair or replace the harness.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.