Component Inspection

■ Brake light switch Check 

1. IG "OFF".
2. Disconnect the brake light switch connector.
3. Measure resistance between power terminal and signal terminal of the brake light switch connector.

   Specification  :

   Resistance between terminals of the brake light switch - ∞ Ω (when the plunger is pushed down), 0 Ω (when the plunger isn't pushed down).

   Resistance between the terminals of the brake switch - ∞ Ω (when the plunger is not pushed down), 0 Ω (when the plunger is pushed down).

   Fig 1: Measuring Resistance Between Power Terminal And Signal Terminal Of Brake Light Switch Connector

   Courtesy of HYUNDAI MOTOR AMERICA
4. Is the measured value within specifications?

   YES 

   • Fault is intermittent caused by poor connection in brake light switch harness and/or HECU's connector. Go to "Verification of Vehicle Repair " procedure.

   NO 

   • Substitute with a known-good brake light switch and check for proper operation. If problem is corrected, replace brake light switch and then go to "Verification of Vehicle Repair " procedure.