Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Servo Vacuum Test

Fig. 72 Servo Harness Connector:





1. Remove speed control cable at throttle body end, then disconnect four way electrical connector and vacuum harness at the servo.
2. Connect battery voltage to pin No. 2 of servo, then ground remaining three pins.
3. Connect a hand held vacuum pump to servo, then apply 15 inches of vacuum. Cable should pull in and stay as long as vacuum is applied.