I don’t have a diagram but the AM harness will have a radio connector with the letters A-F just above the wires. The connections are as follows. A- black/white 2 wires. B- no connection. C- ltgreen 2 wires. One black/white and one ltgreen to each speaker. D- gray. Radio light. E- yellow. Power from radio fuse. F-black . Ground.
Each speaker lead, one about 2’ for the right side and one about 4’ for the left side will have a female connector that mates to the speaker pigtail. The gray-yellow-black wires have a female connector that mates to the main harness radio connection, a male connector with the same color wires.
There may be an additional male connector with a black/white and blue wires. The blue wire will either connect to B on the radio connector or it will connect to a rear speaker fader control. This would be a rear speaker connection.
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