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Home >> Isuzu >> 1987 >> Trooper II Base, 4D Utility, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System >> Component Testing >> Vacuum Switching Valve >> All Others

All Others

Connect jumper wires from valve connector terminals directly to battery. Plunger should "click" with battery voltage applied. If plunger does not "click", replace valve.