Relay Testing

Caution:
a. When applying battery voltage to the Control Relay, verify power source connections are to the correct terminals. Otherwise, the Control Relay will be damaged.

b. The following test procedures should be performed in the order instructed. If not, inaccurate results and damage to the relay may occur.

Control Relay And Connector:

1. Disconnect the Control Relay electrical connector, and remove the relay.

MPI Control Relay Circuitry:

2. Connect a lead wire with alligator clips from the positive terminal of the battery to terminal # 10 of the relay.

Checking The Control Relay:

3. Check for voltage from terminals # 4 and # 5 to ground, when the lead wire from the negative terminal of the battery is connected to terminal # 8 of the relay.
Battery voltage should exist during connection.

4. Connect the lead wire from the negative terminal of the battery to terminal # 6 of the Control Relay.

Checking The Control Relay:

5. Check for continuity between terminals # 3 and # 2, while the lead wire from the positive terminal of the battery is connected to terminal # 9 of the relay.
Continuity should exist during connection.

6. Connect the lead wire from the positive terminal of the battery to terminal # 3 of the Control Relay.

Checking The Control Relay:

7. Check for voltage at terminal # 2, when the lead wire from the negative terminal of the battery is connected to terminal # 7 of the relay.
Battery voltage should exist during connection.