I want to replace my factory stereo with an aftermarket stereo. Does anyone know where I can find the wiring diagram so I can easily match the factory wires to the new stereo?

FSM (Factory Service Manual , on 2CDs)
(Has Electrical Troubleshooting section,which includes schematics)
'Have to order through dealer.

[Sometimes, Dummys have pirated versions available on flea bay.]

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'84 300SD sold
124.128