I think I have it!!!
Folks,
I think I answered my own question. I did some digging on the w124 CDs and found the entire sound system wiring guide.
As best as I can see, this is layout for the plug connected to the amp. This is for the right side amp... left is the same.
1 Blank/unused
2 Output-to speaker (Right front -)
3 Input-from radio harness connector B-#3 (Right front +)
4 Output-to speaker (Right front +)
5 Input-from radio harness connector B-#4 (Right front -)
6 Power-Tied to Left Amp #6
7 Input-from radio harness connector B-#2 (Right rear -)
8 To Left Amp #8
9 Input-from radio harness connector B-#1 (Right rear +)
10 Output-to speaker (Right rear -)
11 Ground-Tied to Left Amp #11
12 Output-to speaker (Right rear +)
I need to test this to be absolutely sure. Anyway, assuming this is correct, I should be able to bypass the amp by unplugging the connectors and jumping the following on each connector:
4 - 3
5 - 2
7 - 10
9 - 12
Comments???
Willy
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