D4 Check Warning Indicator Diode

- Anti-lock brake control module disconnected.

- Key ON.

- Connect the "BK/BL" wire at the anti-lock brake control module connector to ground.

- Check to see that the anti-lock brake warning indicator does not illuminate when grounded.

- Does the anti-lock brake warning indicator illuminate?

YES -- Go to D6. D6 Check ABS Relay

NO -- Go to D5. D5 Check Voltage From ABS Relay