Pump Motor Relay B Resistance Check

Disconnect pump motor relay B. Measure resistance between terminals No. 1 and 3. See Fig 1 . Resistance should be 55 ohms. Apply battery voltage across terminals No. 1 and 3, then measure resistance between terminals 4 and 5. Resistance should be less than 2 ohms. Replace relay of operation is not as specified.

Fig 1: Testing Hydraulic Brake Booster Pump Motor Relay B

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.