Century Estate Wagon V6-231 3.8L (1985)
Fig. 002 - WIRING DIAGRAM for Fan "On" At All Times - Two-Speed Coolant Fan. VIN 3
CHART C-12E
FAN ON AT ALL TIMES CHECK
3.8L "A" SERIES
1.
This step will separate the problem between the delay or the fan control relays.
2.
Check to see if CKT 535 is shorted to ground which would keep the relay grounded at all times.
3.
Checks to see if circuit 335 is shorted to ground. A light indicates the wire is shorted to ground and the following steps will isolate the short.
4.
If the test light is "off" after disconnecting. The ECM is shorted internally. Before replacing the ECM, be sure and check the resistance value of
the low speed fan control relay. Replace if resistance is less than 20 ohms. Also be sure that circuit 535 is not shorted to B +, and check the
resistance of the canister purge solenoid and replace if under 20 ohms.