Pickup 4WD V6-2972cc 3.0L SOHC (1991)
Should not exist.
11. Using an ohm meter check for continuity between relay harness connector 5 and ground.
Continuity
Should not exist.
Battery Voltage And Back-up Circuit
KEY "OFF" POWER CIRCUIT
1. Using a volt meter, check the voltage between ECU harness terminal 103 and ground.
Voltage
System voltage.
2. Disconnect the negative battery cable and the ECU connector.
3. Using an ohm meter, check for continuity between the positive battery terminal and ECU harness terminal 103.
Continuity
Should exist.
4. Using an ohm meter, check for continuity between chassis ground (not the negative battery terminal) and ECU harness terminal 103.
Continuity
Should not exist.
Ground Supply Circuit
