Radio speakers not working

2forty · Post by **2forty** » 19 Apr 2016, 19:43

I own a 97 850 and there is sound coming out of the right front dash speaker only. I have a little sound from the rest but not good at all. When i play with the fader on the radio it changes the sound a little. I took a speaker from my other volvo and that did not fix it. I also took the radio out of another 850 and that did not change anything so I presume I have wiring issues but how do I test the wiring. How many amps or volts or??? should I have at each speaker? What else should I test?
Thanks

Post by **Ozark Lee** » 19 Apr 2016, 22:20

My guess is that you have an amp installed in the car and it is either bad or it possibly just blew a fuse. With an external amp the only speakers that work directly from the head unit are the dash tweeters. Depending on which head unit you have you can usually bypass the amp by swapping the connectors from the head unit to and from the amp. The connector that plugs into the amp will also plug directly into the headunit. The connectors to and from the amp are usually hidden in a gob of foam covered tape

There are some head units that have no internal amplifier at all, like the SC901, but most of the SC815 /SC816 units do have a decent size amplifier built in.

Check the fuses first though.

...Lee

Post by **E Showell** » 20 Apr 2016, 05:21

Are these fuses in the main fuse box or located somewhere in the external amp?

Post by **Ozark Lee** » 20 Apr 2016, 15:53

I pulled up the schematic and the same fuse feeds both the headunit and the external amp so if the headunit is working then the amp is getting power - as long as it is factory.

...Lee