Remove control relay, located under right side of dashboard, near blower motor housing. Using an ohmmeter, check continuity between relay terminals No. 3 and 4. Then No. 1 and 6. See Fig 1 . If no continuity is present, go to next step. If continuity is present, control relay is defective.
Check continuity between terminals No. 3 and 9. Approximately 95 ohms resistance should be present. Check continuity between terminals No. 7 and 10. Approximately 35 ohms resistance should be present. Check continuity between terminals No. 6 and 8, then reverse leads. Continuity should exist in one direction only. If relay does not perform as indicated, relay is defective.
Apply battery voltage across terminals No. 7 (positive) and No. 10 (negative) while checking continuity between terminals No. 3 and 4. If continuity is present, relay is okay. If not, replace relay.
Apply battery voltage across terminals No. 6 (positive) and No. 8 (negative) while checking voltage on No. 1 and 2. If battery voltage is present, relay is okay. If not, replace relay.

Fig 1: Identifying Control Relay Terminals (3.0L)

Courtesy of HYUNDAI MOTOR CO.

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.

Safety Warning

Control Relay (3.0L)