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SIDE STEP LIGHT TSB Revision CHASSIS ELECTRICAL 54A-93 . TECHNICAL DESCRIPTION (COMMENT) . TROUBLESHOOTING HINTS • The side step light-ECU may be defective • The wiring harness or connectors may have loose, corroded, or damaged terminals, or termi- DIAGNOSIS Required Special Tool: • MB991223: Harness Set STEP 1. Check the battery power supply circuit to the side measure the voltage available at the harness side of the (2) Measure the voltage between terminal numbers 1 and ground. • The voltage should measure approximately 12 volts (battery positive voltage). Q: Is the measured voltage approximately 12 volts (battery positive voltage)? AC204173 CONNECTORS : D-209, 221 AL D-209 D-221 AC204170 CONNECTOR : D-137 HARNESS SIDE D-137(GR) D-137(GR) AR 1 2 8 7 4 5 10 11 12 6 9 3 AC204599 1 2 8 7 4 5 10 11 12 6 9 3 CONNECTOR D-137 AB |