I need a little help on were the wires go on the back of the oil pressure guage. It's a 88' 300 TE. I had to changing a couple bulbs and when I pulled the Instrument Panel out. The back of the oil pressure gauge block open up and the wires came out. There are 3 wires going to it BR/BU, BR/GR, GY/BU and four pins on the back of the gauge. I can't find a wiring diagram on it. I need to know what wires to what pins. Any Help??