You can trace the wire from the realay to the fan...I cannot remember but it is an easy trace.....If the hot relay is the fan....that most likely says fan motor problems...It is possible to rebuild your fan motor without too much trouble...

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1978 Yellow 300D (The Mustard Toad)
1980 Blue 240D (The Iron Toad)
1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad)

(Open the pod bay doors HAL)