plymouth Workshop Repair Guides

Plymouth Workshop Service and Repair Manuals

Manifold Pressure/Vacuum Sensor > < Coolant Temperature Sensor/Switch (For Computer)|Specifications|Page 129
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Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

Fig 2  Spark Control Computer 10-Wire Connector

NOTE:  Grounding the carburetor switch eliminates spark advance on most models. On models with feedback carburetor it also provides a fixed fuel/air
ratio.

1. With ignition switch in "OFF," position, disconnect 10-wire harness connector from "Spark Control Computer."
2. With throttle completely closed, check continuity between terminal 7 and the engine ground, see figure. Continuity should exist. If not, check

wiring and carburetor switch.

3. With throttle opened, check continuity between terminal 7 and the engine ground, Fig. Continuity should not exist.

Manifold Pressure/Vacuum Sensor > < Coolant Temperature Sensor/Switch (For Computer)|Specifications|Page 129