Federal

NOTE: The Hall effect sender should only be tested if the engine does not start and there is no spark at the spark plugs.

CAUTION: Always turn ignition OFF when connecting or disconnecting Hall sender or ignition (Hall) control unit terminals.
Be sure to check the integrity of the wires, connectors, battery terminals and fuses before replacing an expensive component.

1. Be sure ignition coil is in good working order. If needed, test coil first. See Powertrain Management/Ignition System/Ignition Coil/Testing and Inspection/Procedures. Testing and Inspection
Be sure ignition (Hall) control unit is in good working order. See IGNITION SYSTEM/HALL EFFECT SENSOR/ TESTING AND INSPECTION. Hall Effect Sensor
2. Remove distributor cap and visually inspect the Hall sender. If Shutter wheel is touching the sender, there is corrosion or other damage, replace and retest with new component.
3. Disconnect the coil wire from the center of distributor and connect it to ground so engine can't start.

Testing Hall Sender Signal:

4. At the ignition (Hall) control unit, push back the rubber boot to access the back of wire connections.
5. Connect a voltmeter between connector terminal 3 and 6.
6. Slowly turn the engine over by hand using a socket or wrench at the crankshaft pulley main bolt. The fluctuating signal should read between:

0 - 2 volts

If not, replace and retest with new Hall effect sender.
7. Disconnect all test equipment, reconnect the coil wire and cover the ignition (Hall) control unit connector with its boot.