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Old 05-30-2014, 10:21 PM   #1
QIK-BRIK
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Default front speakers not working. Tried searching NASIOC but still totally confused

Hi guys, I hope you can steer me in the right direction and I will try to keep this as brief as possible.

I have a 2006 Forester with a 6 disk OEM head unit. The previous owner had aftermarket front speakers installed and he took them out when I bought the car (so the car only had rear OEM speakers and OEM head unit when I got it). I have used the car with this set up for the past 6-7 months, and today I decided to finally install new front speakers. I hooked up the new speakers to test them and I am not getting any noise at all from either speaker. Not even a crackle or any other kind of noise. The fader was set correctly and the wires were connected properly.

I checked each of the speaker wires with a multimeter and I am getting 2-3 ohm resistance, so I don't think any of the wires are broken. Also, I was not getting any voltage reading from the speaker wires with the head unit turned on, but I'm not sure if that was the right way to test it or not. The only thing I can think of is that maybe I have burnt out the front channels of the head unit by using it without the speakers hooked up? I read on a different forum that some of the stock head units will cut power to each channel if the head unit detects that a speaker is unhooked or blown out. I'm not sure if that is what's going on here. I disconnected the battery hoping to reset the head unit (assuming it does have this power cutting feature) but that didn't make a difference. Any advice is appreciated.

thanks,
Dan
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Old 05-30-2014, 10:24 PM   #2
aerosaaber
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check out the wiring a little closer, he may have hacked the harness when he installed the speakers and failed to repair them once he pulled the speaker out.

Pull the headunit and test the front speakers connection directly from the back of the deck. If there's power there, you can always run new speaker wire to the doors. (pull the door grommet out and feed the wire through rather than trying to feed it all the way through)

I don't think the front channel of the amp would have burned out with nothing connected as no power would be flowing. Unless there was a short or a bare wire. BUT if that there were the case, it would have blown the fuse but probably not have damaged the amp chip.
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Old 05-30-2014, 10:45 PM   #3
QIK-BRIK
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thanks for the tips. I checked the wires and everything looks good. The resistance test confirmed for me that the wires aren't broken or shorting out, so that's why I'm leaning toward a head unit problem... You make a good point about a fuse being blown. Do you know if there are separate fuses for the front channels and the back channels? And I'm guessing any fuses for the internal amp would be in the head unit?
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Old 05-30-2014, 11:05 PM   #4
aerosaaber
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no idea if there are separate fuses (or if there are any fuses), but if there are (any) fuses on the deck they'll be on the backside.
How did you test the wires? From your OP I thought you were referring to the wires on the speakers themselves.

If the headunit is toast you can probably find one in the classifieds or just get an aftermarket deck.
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Old 05-31-2014, 09:03 AM   #5
Guzzi 1
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Not knowing the condition of the wiring, I might also suggest connecting the front channels of the HU to the rear speakers. You know they're working. If they still work on the front channels, you know the HU is OK. Or reciprocate the front speakers to the rear outputs. Either way you can narrow down the trouble.

If you know a phone guy that you can borrow a test set from for a little while, you can use that on monitor and hear if the HU is putting out sound on all channels. Just clip it on in place of a speaker.

John
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Old 05-31-2014, 09:34 AM   #6
QIK-BRIK
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I will check the back of the HU for any fuses today, and that is a good idea to connect the front channels to the rear speakers to see if anything comes out. To test the front speaker wires I used an ohm meter. I connected one end of the meter to the end of each speaker wire where it would connect to the speaker and I connected the other end to each terminal in the wiring harness that plugs into the HU. I'm just totally confused as to why the front channels wouldn't be working. I don't think I am missing anything obvious since I have checked and double checked but it's possible so I will look over everything again today.
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Old 05-31-2014, 02:01 PM   #7
aerosaaber
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you checked both wires from the headunit harness to the speaker end plug and they were ok. so the wires are not the issue (unless there's a fray and intermittent short which is unlikely w/ the complete lack of sound)

You tested the speakers and they don't appear to be blown. But have you tried to hook up some actual audio to them to see that they're making sound (probably not the issue since the continuity is there, but cover all your bases)

that leaves the headunit. I've never had a stock headunit lose function of part of the amp. (I did have an aftermarket that would lose the left side when it got too hot) Actually I've never had a stockhead unit's amp fail at all. If I replaced them it was always to get more features.

Swapping the channels front/rear connections will allow you to test the front speakers and the front channels at the same time and then you'll have a good idea about the state of the headunit.
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Old 05-31-2014, 05:58 PM   #8
sebhockey
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Testing from the speaker end of the wire to the head unit for continuity is just one step. Test to ground and between the two with both ends disconnected to ensure the wires aren't shorting out. Also reconnect the speaker and test through the coil from the head unit side. Unfortunately voltage testing with a multi-meter won't tell you much with audio as the best you would ever see is an average. Unless you have an oscilloscope or audio test set your best route would be to swap channels on the back of the head unit directly to rule out a bad head unit.
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Old 06-02-2014, 10:08 AM   #9
QIK-BRIK
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guys thanks for all of the suggestions... After a few hours of frustration I was looking at the back of the head unit and noticed that some of the pins for the front speakers had been broken off. So that ended up being my issue. I never thought to look at the pins before since everything looked fine at a quick glance and there was no issue with the harness connecting to the HU. But when I looked closely the HU was missing two pins that looked like they were sheared off. I ended up putting in a Kenwood 6.1" touch screen and trashing the stock HU. Now everything works well... My new problem is that the new component speakers sound great, but now I want more bass haha
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Old 06-02-2014, 08:44 PM   #10
aerosaaber
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Quote:
Originally Posted by QIK-BRIK View Post
My new problem is that the new component speakers sound great, but now I want more bass haha
this is not a problem, it proves that you


























have ears.
Carry on.
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Old 06-02-2014, 08:51 PM   #11
Guzzi 1
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I'll wager the PO knew the original HU was messed up. He probably broke the pins himself. Using the excuse of removing the front speakers made a simple explanation as to why the front didn't work. That sux!

Anyway, I'm glad to hear you got things going.

John
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Old 06-03-2014, 01:41 AM   #12
aerosaaber
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"Honey look, it's broken, now I need to order a new one" said every car modder, ever.
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Old 06-04-2014, 03:46 PM   #13
QIK-BRIK
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Quote:
Originally Posted by aerosaaber View Post
"Honey look, it's broken, now I need to order a new one" said every car modder, ever.
hahaha so true
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