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Home >> Volvo >> 1990 >> 240 Base, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Anti-Lock Brake System) >> Circuit Tests >> Hydraulic Modulator Power Circuits

Hydraulic Modulator Power Circuits

WARNING: This page is about a different car, the 1990 Volvo 760 and 1990 Volvo 740. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect hydraulic modulator connector. Turn ignition on.
  2. Connect DVOM negative lead to ground and positive lead to hydraulic modulator connector terminals No. 6, No. 7, No. 10 and No. 12. DVOM should indicate battery voltage. If battery voltage is not present, perform following repair:
    • No. 6 - Check wire harness and fuses.
    • No. 7 - Attach connector to hydraulic modulator. ABS warning light should illuminate on dashboard. If light does not illuminate, replace bulb.
    • No. 10 - Check transient surge protector fuse. If fuse is okay, replace transient surge protector.
    • No. 12 - Check wire harness and 80-amp fuse on top of right front wheelwell.
  3. Turn ignition switch off. Attach connector to modulator.
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