Hydraulic Modulator/Pump Relay Resistance Test

Turn ignition off. Unplug pressure switch connector from hydraulic modulator. Using an ohmmeter, measure resistance between ECU connector terminals No. 2 and 14. See Figure . If resistance is 50-100 ohms, go to next test. If resistance is not 50-100 ohms, check wiring. If wiring is faulty, repair wiring and retest. If wiring is okay, replace relay and retest.