Lancer L4-2.4L SOHC (2005)
Taillight Relay Circuit
CIRCUIT OPERATION
When the lighting switch is set to "TAIL" position, the "TAIL" signal is sent through the column-ECU (incorporated in the column switch) to the
front-ECU. IF the front-ECU receives the "TAIL" signal through the column-ECU, the front-ECU turns on the taillight relay (incorporated in the
front-ECU), thus causing the taillights to illuminate.
TECHNICAL DESCRIPTION (COMMENT)
If the taillights do not illuminate normally, the column switch or the front-ECU may be defective.
TROUBLESHOOTING HINTS
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The column switch (taillight switch) may be defective
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The front-ECU may be defective
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The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector