Electricals Again (Radio)

[Grant Lenahan]

  You appear to be measuring from 12V to a capacitor. Ignore it.

Grant

On 10/19/2010 11:50 AM, mkb wrote:
> I'm not completely sure I understand where you are measuring voltage, but if
> the red wire with +12.5v is on one side of the fuse, and the red/blue
> wire with 1.6v
> and dropping is on the other side of the fuse, your problem is almost
> certainly a
> bad fuse.  Likely it conducts some electricity until it heats up, at
> which point its
> resistance increases causing the drop in voltage.
> - Ales
> <<<<<<<<<<<<<
>
> Hi Ales,
>
> I'm actually measuring from the fuse panel.  What I did was, take the fuse out,
> measure from the fuse terminal to ground and I get 12.5v and no voltage drop.
> This is where the red wire goes in.
>
>
> I then measured from the other terminal to ground.  This is where the red/blue
> wire attaches.  I see a steady voltage drop here from about 1.6v to about
> 20-22mV in about 20 minutes.
>
>
> Putting the fuse back in seems to "energize" the circuit.  But what is strange
> is that if I leave the fuse in, come back in 20 minutes or so, pull the fuse and
> check voltage from red/blue to ground I get about 20-22mV.  So I'm not sure
> what's going on here.
>
> Don't know if that makes sense?
>
> So, in order to get the radio working, I pretty much have to pull/push the fuse
> every time.
>
> --
> mohammed
> 99 a6 2.8q avant
> 97 a4 1.8tqa
>
>
>
>
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