1989 5.0 with premium sound package radio install
I have a 1989 mustag 5.0 ho with the premium sound system. I am changing out the head unit with a after market wire kit...
there are 4 plugs on the kit:
1 black long rectangle shape
1 grey long rectangle shape
2 grey square ones
the power, acc, neg conect to the grey
speakers to black
1 grey square plug is connected to both the rectangle, 1 with power ect. other connected to speaker
Now the rectangle plugs plug in fine but the amp in back has 2 plugs that are square.
my question is that i can get unit to power on but no sound. what is the correct way to install, unplug all fact connects and put new plugs in? checked out installdr no help