I just obtained my 67 Malibu and have found that when you turn the lights on, the dash lights do not work but both dash turn signal lights come on. When you turn on a turn signal the indicator then flashes. Also the fuel gauge shows full. The previous owner installed a separate horn button because the horn on the wheel doesn’t work and also installed a switch under the dash to be able to turn the heater blower motor on due to the fact that none of the heater controls are connected. I guess I have to replace my wiring and was thinking about using the Pain Less harness so I could change over to Gauges. Has anyone used the Pain less harness and which should I use, the 12 or 18 circuit.