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since this season i took my c4 out i have only one speaker working, everything worked last year before i put it to rest, anyone have any thought what to look for or whats wrong it a stock radio
Most likely the capacitors in your speaker amps (1 amp in each speaker) have deteriorated (leaked) and the amps need to be rebuilt. This is solely a function of age and is common in older Bose systems. There are numerous places to get these repaired, do a search on here. Prices vary from $100-200 for the service and you have to remove the speakers and send them in for repair or do the research and fix them yourself for way less.
When I did an after market (Pioneer DEH-P47DH), which was a pretty old receiver, I reused the speaker wires, and put in new speakers as well. Except for splicing in the wiring harness, it was pretty much a direct bolt in. Looking just now for an upgrade, which I really just need bluetooth so I can play audio off my phone.
To the OP, with the Bose, the amp is in each speaker, IIRC. You need to get your multimeter out and start testing.
I installed an aftermarket system to my '91 many years ago. I went with 1DIN head unit, separate front speaker kit, 2 channel amplifier to the subs and 2x 8" subs to the original rear speaker boxes. I put the crossovers under the HU and used all new power and speaker cables.
Works nicely but I plan to move the treble elements up to maybe the door panel or something. They are muffled a bit when they are down there with the mid range speakers.
Here are few pics:
1 DIN bracket and the 2 (red) crossovers under the head unit space:
Rear 8" sub amplifier located under passenger seat:
The DIY front speaker boxes with mid range and the treble elements:
Power connection with a large fuse:
The 8" sub in a sealed passenger side rear speaker box with a DIY speaker adapter/ring:
radio?
