I have a 93 legend LS (bose premium system), factory system.
I have no audio, but I can hear the *slight* hum/static when volume is ALL THE WAY up, which almost makes me think the speakers are being powered (and makes me think it's the headunit at fault), but maybe the signal from the AMP is the problem.
All functions on the head unit are normal, I can change stations, source, etc, power on and off, power antenna goes up, Fuses are fine.
Is head unit the faulty, or the AMP?
I have replaced both in the past. I would like to replace only the one which is broken this time!
what i said was disconnect the plugs on the amp behind the seat. jump the speaker wires between the two plugs and see if you get music. if you do then the amp is probally bad. also check the connections on your speakers and ensure they are connected properly. as far as the radio goes, the only way i know to test that is with another radio.
what i said was disconnect the plugs on the amp behind the seat. jump the speaker wires between the two plugs and see if you get music. if you do then the amp is probally bad. also check the connections on your speakers and ensure they are connected properly. as far as the radio goes, the only way i know to test that is with another radio.
How do I 'jump the speaker wires between the two plugs'? Not sure if I understand how to do this part.
indentify the speaker wires, i think the diagram is in the manual. just do one speaker at a time to make it easy. take a strip of speaker wire, use like 18g if you got it, it makes it easier to put into the slot. strip the ends and put them into to the holes in the plug and do the same for the other plug. make sure you match up the right speakers.
page 23-256 in the manual. thinking about it, if you have another speaker connect some wire to it unplug the input on the factory amp and stick the wire into a speaker slot, that may be easier.
indentify the speaker wires, i think the diagram is in the manual. just do one speaker at a time to make it easy. take a strip of speaker wire, use like 18g if you got it, it makes it easier to put into the slot. strip the ends and put them into to the holes in the plug and do the same for the other plug. make sure you match up the right speakers.
So run the jumped speaker wire to a different source, like a receiver from the house that is known to work? Ok, that is a good idea, that should verify the amp is the problem.
unplug the input plug on the factory amp behind the seat. you can now do one of two things:
1. you can unplug the output plug as well get you a piece of speaker wire and strip the ends. then take the wire and stick it into the plug for one speaker. then take the other end of the wire and put it into the output plug to the same wires.
2. if you have another car speaker, you can unplug the input plug on the amp and get a piece of speaker wire, strip the ends and stick then into the plug for one speaker and connect the other end to the speaker terminals.
So run the jumped speaker wire to a different source, like a receiver from the house that is known to work? Ok, that is a good idea, that should verify the amp is the problem.
The idea is that you're going to hook speaker(s) up to your head unit without the amp to see if you're getting a signal from the head unit. If you get sound you know the amp was the problem, if you don't then it looks like the HU is the issue.
Sorry, I didn't realize the head unit could provide power&audio without the amp, I thought it had no internal amp. That's why it confused me. I will try this! Thanks for the tips Biggg72 and sap!
Sorry, I didn't realize the head unit could provide power&audio without the amp, I thought it had no internal amp. That's why it confused me. I will try this! Thanks for the tips Biggg72 and sap!
actually you're thinking is correct. im not sure how the procedure mentioned above can possibly provide you with any audio when there is no amplification. try it and see i guess. i believe the factory amps are often the source of failures on these audio systems so its most likely that.
yes, i read somewhere on here about the premium radio's being amplified themselves along with the amp behind the seat, but in any event he should still get something out of it, thats why i said it may be low in sound.
actually you're thinking is correct. im not sure how the procedure mentioned above can possibly provide you with any audio when there is no amplification. try it and see i guess. i believe the factory amps are often the source of failures on these audio systems so its most likely that.
Quote:
Originally Posted by Biggg72
yes, i read somewhere on here about the premium radio's being amplified themselves along with the amp behind the seat, but in any event he should still get something out of it, thats why i said it may be low in sound.
I seem to recall reading a thread recently where someone bypassed their amp with a 2100 or Premium system and still got a little bit of sound. Not having the amplifier means that you'll get almost no current to the speakers, but hopefully enough to tell if the amp was the issue.
Taking another signal to the amp input isn't a bad idea either. Personally I'd just be trying another head unit, even if it was an aftermarket one with speaker level outputs.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Linear Mode
