The aftermarket stereo in my 93 K1500 stopped working the other day. I never liked it from the first day I got the truck, so I went to the junkyard and bought an 88-94 am/fm tuner, I already had the amp under the dash. I hooked up the tuner to make sure it worked, and it does. The only question I have is, besides the main plug on the tuner that plugs into the amp under the dash, what does the other small plug connect to? I circled it in this picture, it is a white wire with a black end. It comes out of the tuner wiring and it looks like it plugs into another wire with a black end on it. The only problem is that the PO twisted all the wiring together for the aftermarket stereo. so there is no wire with another obvious black plug on it, there's just a bunch of wires twisted together wire wire caps on the end of them.
I am also wondering where I can find an antenna cable extension, also circled in the picture. It is the smaller style plug, not the bigger plug used before 89.
Thanks