My daughter bought a 1980 300SD. It's a nice car and we only know of one 'major' problem. The radio doesn't work! The previous owner said it hasn't worked for some time.
No problem. She wanted to use her radio from her old car which has a MP3 player. So I started the exchange today. Here's the problem.
Apparently the speaker wiring is the problem. The speaker wires behind the radio appear to be unchanged (no splices and cuts). I performed a continuity check from these wires to the rear speakers and on the left. The speaker negative wire connection is good but the positive wire from that same speaker connects to the same wire under the dash!? The right rear speakers have a similar problem. The negative wire connects but the positive wire apparently is not connected.
My conclusion is someone messed with the speaker wires. A glance under the dash and in the trunk showed no visual flaws in the wire routing but there's not much to see without removing panels.
I have not done any experiments on the speakers in the door panels (I assume there are speakers there) because it was time to watch football. So before I go back to the task tomorrow (after the Cowboy game) and would appreciate any words of wisdom from you folks.
Are there any obvious places where the wiring is routed that I can check? Which side does it route? Is the door panel a pain in the neck to remove to access the front speakers? Or, should I just forget it and route new wires to the back and forget about trying to solve the existing problem?
Thanks in advance, Mark Austin, Texas