Hyundai Coupes/Sedans 1986-1993 Repair Guide
ABS Warning Lamp Relay
Remove the relay from the relay box located in the engine compartment.
Use an ohmmeter to check continuity. There should be continuity between terminals 1 and 3. Continuity with approximately 0 ohms resistance should also exist between terminals 2 and 4.
Apply 12 volts to terminal 1 and ground terminal 3. With power applied, there should be no continuity between terminals 2 and 4.
If any test condition is not met, the relay must be replaced.