Oldsmobile/Buick Repair: 1987 Oldsmobile Cutlass Ciera, oldsmobile cutlass ciera, olds cutlass ciera

Question
I'm having problems with the rad fan not cutting in on my 1987 Olds Cutlass Ciera (2.8 L). I've changed the temperature sensor, but it made no difference.  Have now purchased a new rad fan relay but can't find its location on the engine.  Could you tell where it is located and any other troubleshooting I could try if that does not work.

Answer
There is a TEMPERATURE SENSOR that has a BLACK and YELLOW wire and there should also be a TEMPERATURE SENDER which has a green/white wire that controls the fan realy of which controls the FAN CONTROL MODULE of which turns on the FAN at different speeds.

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