Vacuum Pump
- Disconnect vacuum pump connector A-105. Resistance should be 50-60 ohms between terminals No. 1 and 2 and terminals No. 1 and 3. SeeFigure. Ensure solenoid valve makes operating noise when battery voltage is applied between terminals No. 1 and 2 and terminals No. 1 and 3.
- If solenoid valve does not make noise, replace vacuum pump assembly. Apply battery voltage and ground between terminals No. 1 and 4, motor should operate. Replace vacuum pump if motor does not operate.