Relay Box (Fail-Safe Relay Harness Test)
WARNING: This page is about a different car, the 1994 Mazda MX-3. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch to OFF position. Disconnect ABS control unit 18-pin connector. Turn ignition switch to ON position. Connect terminal 2J (Black/Blue wire) of ABS control unit 18-pin connector to ground. See Fig 1 .
- If fail-safe relay in relay box does not click or ABS warning light illuminates when terminal 2J is grounded, check fail-safe relay. See RELAY BOX (FAIL-SAFE RELAY RESISTANCE TEST). If fail-safe relay is okay, check wiring harness between fail-safe relay and ABS control unit. If wiring harness is okay, go to next step.
- With terminal 2J grounded, check for 12 volts at ABS control unit 18-pin connector terminal 1D (Brown wire). If terminal 1D does not indicate 12 volts, check fail-safe relay and wiring harness between fail-safe relay and hydraulic unit.