I was in a salvage yard and came across a late model P71. It still had the trunk lid mounted flasher brackets and the factory FORD switch. In the trunk was also Federal Signal Flasher. It is marked Flsh Asy Plc, Model 1W7J-15591-AA. It has four wires. White w yellow trace, yellow, red and black. The last two end in a factory connector. I searched the site and got a few hits for the numbers but there was not any info. I'm sure someone here can tell me what this flasher is for and has a wiring diagram? Thanks.