2010 factory amp either REALLY weak or busted.

[Drdan524]

The factory amp in my 2010 Ram 1500 with Alpine stereo seems to either by VERY weak or is broken. There is nothing coming out of the subwoofer and I see no movement in the sub. I have tried 2 different subs in the truck, 1 being brand new. Anything else I need to check before completely condemning the amp? The rest of the stereo system works fine.

 

[drittal]

Always check the simple stuff like wiring before condemning the amp. I am not at all familiar with the Ram OEM stereo. Is there a way to turn off the subwoofer at the HU? Is the amp fused? It better be. Check that too.

 

[Drdan524]

There is no way to shut off the sub through the head unit. I checked the wiring and all seems fine. I have continuity between the amp and the sub. I put a voltmeter on the wires at the sub and it fluctuates between 1 and 1.6 volts.

 

[drittal]

You might get more traffic in the audio and electronics section

 

[Drdan524]

I posted on my phone and thought that's what I was but some how it ended up here

 

[Etroze86]

If that's AC voltage that is literally next to know power to your sub.

 

[drittal]

I find it odd that there isnt a way to adjust the factory sub level or even mute it.

 

[Drdan524]

That was the DC voltage. I haven't found a way to adjust anything with the sub from the head unit. It is the RESULT head unit

 

[drittal]

The voltage on the subwoofer leads would be AC.

 

[Drdan524]

I will check next chance I get. I had the voltmeter set to dc

 

[Drdan524]

So now I am getting no voltage. Checking the wiring diagram on techauthority.com, it says there are 4 wires from the amp to the sub GY/WT, DG/WT, GY/BR and DG/BR. But at the speaker plugs the wires are just white and black. Any help is greatly appreciated.

 

[Drdan524]

So I checked things right at the amp. I get a range of .1 volt to .7 volt a/c right out of the amp. That tells me that the amp is no good, correct?