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Q: Heater fan does not work on 1990 Buick LeSabre

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The is a 87 Buick LeSabre. I checked for power on four wires there is none. I've checked fuses O.k. Is it possible that I have inline fuse issues?? Winter is coming up fast. Could really use the help( And the heat) Thank You!
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Supply power to the purple wire at the blower motor it should work if the motor is good and the black ground wire at the motor is good. Check the blower motor relay, red at the blower motor relay must be live or the rust/brown colored fuse link is bad, Orange wire should be live at the blower motor relay in the high speed position, dark blue comes from the blower motor resister (gives variable speed operation). Recheck fuse #7 (25 amp) that protects the heater circuit.
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