Does anyone know the part number to this lamp socket or is some weird wiring done by the previous owner. I have an 87 cutlass and I’m trying to replace the socket for the rear passenger bottom, however when I do find a black socket it says it only comes with 3 wires not 4 like mine. Reason for replacing is it’s old and I believe it’s bad. When you press the brakes it actually dims Isntead of bright like the top one. Just curious to know if that 4 wire socket is normal or just me. On the driver side the bottom one also has 4wires to it. Thanks