Jamiegreen

Well-Known Member

• Sep 11, 2018

• #1

Well this morning I had a dead battery, jump started it but noticed later I didn't have any music. The aftermarket alpine radio is working fine, just no sound, not even a hiss. I checked the 2 fuses under the drivers kick panel, and they are fine.. am I missing something? I'm guessing it's the amp that's not working properly.

 

sierrafery

Well-Known Member

• Sep 11, 2018

• #2

Exactly which fuses did you check?... was F17 one of them?

 

Jamiegreen

Well-Known Member

• Sep 11, 2018

• #3

sierrafery said:

Exactly which fuses did you check?... was F17 one of them?

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I believe it was f17, and one next to it, which did cut power to the radio unit too.

 

sierrafery

Well-Known Member

• Sep 11, 2018

• #4

Then the head unit's pre-amp or the amp is fubar or there's a connection issue between them.

 

Jamiegreen

Well-Known Member

• Sep 11, 2018

• #5

Err.. well I don't have any other radios to try.. or amps. I'll have to see if there is power going to the amp I guess.

 

Jamiegreen

Well-Known Member

• Sep 11, 2018

• #6

Eell, I sorta tested some stuff. The radio output power on to the amp is working fine, and so is the constant power to amp. So it's definitely getting power. If I unplug the radjos audio plug, the amp gives a hissing noise, and when I plug the radio back in it goes silent. My guess is dead amp.. i would like to upgrade it but think will just try a scrappy one for now.
Cheers @sierrafery

 

brian47

Well-Known Member

• Sep 11, 2018

• #7

Just out of interest, what's happening on the "System Enable" line out of the head unit? It should be pin 5 on the main plug to the head unit, the plug with the power wiring, not the audio lines.

 

Jamiegreen

Well-Known Member

• Sep 11, 2018

• #8

brian47 said:

Just out of interest, what's happening on the "System Enable" line out of the head unit? It should be pin 5 on the main plug to the head unit, the plug with the power wiring, not the audio lines.

View attachment 158336

Click to expand...

System enable supplies 12v to the amplifier from the radio unit just as it should.

 

brian47

Well-Known Member

• Sep 11, 2018

• #9

Jamiegreen said:

System enable supplies 12v to the amplifier from the radio unit just as it should.

Click to expand...

OK, just a thought.