Lancer L4-2.4L SOHC (2005)
1. Disconnect horn relay connector A-05X and measure the voltage available at the relay box side of the connector.
2. Measure the voltage between terminal numbers 2, 4 and ground.
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The voltage should equal approximately 12 volts (battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery positive voltage)?
YES: No action is necessary and testing is complete.
NO: Go to Step 20.
STEP 20. Check the wiring harness between horn relay connector A-05X (terminal 2 and 4) and the battery.
Q: Is the wiring harness between horn relay connector A-05X (terminal 2 and 4) and the battery in good condition?
YES: No action is necessary and testing is complete.
NO: The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the
connector. Repair the wiring harness as necessary. Verify that the horn sounds normally.
