Test 2 - Charge, Up, and Relief Valves

CAUTION: In order to ensure accurate test results, repeat each test that relies on a hydraulic pressure reading before continuing with the test procedure or condemning a component.

1. Depressurize power hydraulic system on 1988-89 model years by pumping brake pedal 18 - 20 times, until pedal becomes hard.

Test Gauge Connection For Valve Block:

2. Connect test gauge and adaptor to valve block.
3. Lift car on hoist.
4. Disconnect and raise ride height sensor link arm.
5. Start engine and allow to idle.

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TEST 2

NOTE: Take all voltage measurements within 5 minutes of switching ignition ON. If more time is required, switch ignition OFF and then switch ON again.