I bought the aftermarket under the bumper turn signal lights for the 70 grande mustang. They came with a three prong connector, one green, one red and one yellow. The stock connector is two prong, not sure of the color. Anyone know how they hook up? it's odd.
I can't really give a specific answer as to how to hook it up, but I am going to go out on a limb and say that the third wire hooks up to a parking light circuit somehow. I guess you will have to find a hot wire when the switch is on and hook it up to that wire as the ground wire will already be hooked up during the "normal" installation.
I ordered an original electrical manual...might as well go thru all of the electrical systems..It need a ton o work. I'm thinking that the connectors will be cut out, I'll either replace the connectors with two prong ones and just guess em together....you know, touch leads till i get the desired results...the old fashioned way...