I have a 87 base FC and some times whenever I turn car on the power to the ac unit and windshield wipers are completely cut. When that happens sometimes the power to the ac and wipers will come back on unexpectedly when I let the car warmed up. So basically, turn the key where all the electrical stuff comes on which that works, then as soon as I turn the car on ac and wipers power cuts out, let the car warm up sometimes they will both have power again. Already check the connections and battery volts which are in good shape. So if anybody has a solution pls share it.