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Home >> Isuzu >> 1987 >> Impulse Base, Automatic, AW03-70 >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System >> Component Testing >> Vacuum Switching Valve >> All Others
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

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.