Sable V6-182 3.0L (1986)
Figure 2
Measure the voltage at pins 1A, 4A and 7A on the harness side of IRCM connector to battery ground. See Figure 2 for pin locations.
If all three voltage readings are 10.5 volts or higher, perform EEC IV diagnostics in the 1986 Shop Manual, Volume H.
If the voltage at pins 1A and 4A is less than 10.5 volts check for an open circuit between the IRCM harness connector and battery power.
If the voltage at pin 7A is less than 10.5 volts, go to Step 3.
Figure 3
3.
Locate the engine cooling fan dropping resistor mounted on the transaxle under the air cleaner. See Figure 3 for location. Check that the
connector is fully connected. Recheck the voltage at pin 7A; if voltage is 10.5 volts or above, go to Step 6; if voltage is less than 10.5 volts,
go to Step 4.
Figure 4
4.
Unplug the dropping resistor connector and using Rotunda Digital Volt-Ohmmeter 007-00001 measure the voltage between the negative side
of the battery and the harness end of the connector. See Figure 4 for pin location. If the voltage is less than 10.5 volts, check for an open
circuit between the harness connector and battery power. If the voltage is above 10.5 volts, go to Step 5.
5.
Using Rotunda Digital Volt-Ohmmeter 007-00001 measure the resistance of the dropping resistor. If the resistance is less than 0.3 ohms, the
resistor is good and the harness should be checked for an open circuit between the resistor and pin 7A. If the resistance is 0.3 ohms or greater,
replace the resistor (E6DZ-8L603-C). After replacing the resistor, go to Step 6.
