CC head diagnostic only shows 12.0 volts

[Mike Miller]

I had a 200q that read a flat 12.0v on the CC head. It read normal 
battery voltage on the terminal under the hood and at the battery. I 
don't believe the splice is part of the issue.

I drove it at least 50k miles with no problems and I didn't worry about 
it. I agree it is a handy tool to be able to watch how much the voltage 
drops when the fan comes on or you turn on the headlights and high 
beams. But, my other vehicles don't have that handy tool so I never 
wanted to spend time chasing it.

--mike

On 11/2/2012 11:36 AM, Pete Bergin wrote:
> Rethinking all of this, if it has been much over 120k on your regulator/brushes they could be getting a bit week.
> Pete
>
>
> -----Original Message-----
> From: PeterBergin <PeterBergin at aol.com>
> To: ed.kellock <ed.kellock at gmail.com>; 200q20v <200q20v at audifans.com>
> Sent: Fri, Nov 2, 2012 6:45 am
> Subject: Re: CC head diagnostic only shows 12.0 volts
>
>
> I suppose you could study the wiring section in the Bentley and see where
> the feed for the measurement comes from and start taking reading upstream
> until  you find a connection that might be a bit week or get a use AC head,
> plug it in  and see if you get a different reading.
>   
> Don't worry soon something more important on the car will need attention
> and keep you busy!
>   
> Pete
>   
>   
> In a message dated 11/1/2012 10:11:27 P.M. Central Daylight Time,
> ed.kellock at gmail.com writes:
>
> I agree with your  point, to a point... I wouldn't be quite as fixated on
> this if it hadn't just  occurrred.  And the fact that the reading is static
> at 12.0.  I know  and have known for some time that the reading won't be
> accurate and correct,  but it has always been relevant, i.e. a useful indicator
> of system status,  readily available, without stopping or getting out of the
>   car.
>   
>   
> Ed
>   
>
> -----Original Message-----
> From: PeterBergin at aol.com  [mailto:PeterBergin at aol.com]
> Sent: Thursday, November 01, 2012 7:04  PM
> To: ed.kellock at gmail.com; 200q20v at audifans.com
> Subject:  Re: CC head diagnostic only shows 12.0 volts
>
>
> My old Avant was always 13.5-13.8 at the jump post and similar at the
> battery post (eliminate the possibility of a splice problem).  The AC  head
> channel 11 was always ~11.8-12.5 and fluctuated allot depending on the  load
> ware as the dash gauge was more constant.  Never changed much over  10 years
> and 240k miles.  Several brush/reg packs replaced and a re-man  Bosch alt.  I
> would not worry about it.  My old 5000 was the  same.
>   
> Save your worries for the bigger $$ stuff!
> Pete
> 91 Avant sold to Drew and brought back to life!
> 02 S6  Great car same game!
>   
>   
> In a message dated 11/1/2012 12:07:23 P.M. Central Daylight Time,
> ed.kellock at gmail.com writes:
>
> And I have  13.6 at the jump start post and the dash gauge reflects that  as
> well.
>
> 91 200q20v Avant with 248k.
> Threw the alt belt two  days ago.
> I punched up the volt reading on the cc head and it was still  over 13 volts
> when I got home and shut it down.
> I installed a new belt  yesterday and the IC gauge is fine, but channel 11
> only shows 12.0 and it  doesn't change.
> I googled for an hour last night and couldn't find any  info.  I know I've
> seen it mentioned in the past at some  point.
> I'm going to dive into the manuals now.
> Just a quick post in  case anyone's got a quick  answer.
>
> Thanks!
> Ed
>
>
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