[V8] No rear brake light wackyness

[Ron Wainwright]

Ok, comments inserted below.......

--- Scott Simmons <indischrot at gmail.com> wrote:

> The brake light switch gets its power from a 25 am
> fuse, through a 
> red/blue wire to the switch, and red/black takes
> that power ..er.. 
> elsewhere.  Verify 12V at the red/blue wire on the
> brake light switch 
> (at the pedal).  This power is also going to the
> Shift Lock warning 
> buzzer... so is that the one that yells at you if
> you're in drive and 
> open the door? 

 I checked for 12v at the switch as you said & it's
not even close...but I could be doing it wrong. 
 Shift lock warning...this is on my Grey 5spd.

> As far as brake switch failures, if they don't back
> out then the problem 
> is usually a bad spring on the inside that doesn't
> let the button pop 
> out and doesn't connect the two lines, thus no
> lights.

 Spring is fine, in the one I pulled & in the one I
replaced it with.
 
> Dumb question:  You checked continuity on the bright
> filiment on both 
> bulbs, right?

 I checked the rear bulbs inside the trunk & the test
light lite up
 
> Another dumb quetsion:  You checked for 12V at both
> terminals in the 
> bulb socket, right?

 Again yes

> In sum:  check for 12V at the red/blue wire at the
> brake light switch.
> 
> ~Scott S.

 Well as I mentioned I did & it wasn't even
close...again, that is if I did it rite. The reading
was going up & down...but was all way's under 005.0
with the meeter set at VDC.

 HELP.

 Ron

> 
> Ron Wainwright wrote:
> 
> >You know how I'm stupid whenh it comes to
> >this......how would I "jump the switch"? 
> >
> > Ron
> >
> >--- Scott Phillips <Scottp at ippe.com> wrote:
> >
> >  
> >
> >>Ron.. if you just jump the switch the lights
> should
> >>come on
> >>
> >>Scott
> >>
> >>-----Original Message-----
> >>From: v8-bounces at audifans.com
> >>[mailto:v8-bounces at audifans.com] On Behalf
> >>Of Ron Wainwright
> >>Sent: Wednesday, October 10, 2007 3:46 PM
> >>To: Ingo Rautenberg
> >>Cc: v8 at audifans.com
> >>Subject: Re: [V8] No rear brake light wackyness
> >>
> >>Ok, again I just checked the Black switch & with
> the
> >>pedal pressed in or not the circuit tester doesn't
> >>light up.
> >> So I'll replace the Black switch & see what
> >>happens.
> >>
> >> Thanx
> >>Ron
> >>
> >>--- Ingo Rautenberg <ingo.rautenberg at gmail.com>
> >>wrote:
> >>
> >>    
> >>
> >>>Ron, I believe the black one is for the brake
> >>>      
> >>>
> >>lights
> >>    
> >>
> >>>and the clear is  
> >>>for the cruise control interrupt switch.  The one
> >>>for the brake  
> >>>lights works such that when the brake pedal is
> >>>depressed the switch,  
> >>>which is normally closed, is opened and when open
> >>>the contacts inside  
> >>>are closed.  So make sure you're checking the
> >>>      
> >>>
> >>right
> >>    
> >>
> >>>way!  Usual  
> >>>failure mode IME is the brake lights don't turn
> >>>      
> >>>
> >>off
> >>    
> >>
> >>>-- and that's  
> >>>because the hold-down nut is worn and the switch
> >>>closes the circuit  
> >>>and the brake lights stay on all the time. I
> >>>      
> >>>
> >>haven't
> >>    
> >>
> >>>seen the actual  
> >>>switch fail either. But that's from memory.  I'd
> >>>check but I broke my  
> >>>right leg tibia bone Sunday afternoon.  No
> >>>driving/wrenching ANYTHING  
> >>>for me for a while :-(
> >>>
> >>>Ingo
> >>>
> >>>On Oct 10, 2007, at 3:18 PM, Ron Wainwright
> wrote:
> >>>
> >>>      
> >>>
> >>>>I did check the switches at the back of the
> >>>>        
> >>>>
> >>brake
> >>    
> >>
> >>>>pedal...there's a Black one & Clear/White
> >>>>        
> >>>>
> >>>one..which
> >>>      
> >>>
> >>>>do I check. But anyway....
> >>>>...I put a circuit tester on the wires there &
> >>>>        
> >>>>
> >>the
> >>    
> >>
> >>>>circuit tester doesn't light up..as I mentioned
> >>>>        
> >>>>
> >>in
> >>    
> >>
> >>>my
> >>>      
> >>>
> >>>>original post.
> >>>> But not sure why those would be bad...I've
> >>>>        
> >>>>
> >>never
> >>    
> >>
> >>>had
> >>>      
> >>>
> >>>>to replace them in any Audi I've owned.
> >>>>
> >>>> Ron
> >>>>
> >>>>--- Ingo Rautenberg <ingo.rautenberg at gmail.com>
> >>>>        
> >>>>
> >>>wrote:
> >>>      
> >>>
> >>>>>Ron,
> >>>>>
> >>>>>Did you check for continuity in the circuit
> >>>>>          
> >>>>>
> >>from
> >>    
> >>
> >>>the
> >>>      
> >>>
> >>>>>brake light
> >>>>>socket to the brake light switch?  That'll tell
> >>>>>          
> >>>>>
> >>>you
> >>>      
> >>>
> >>>>>if there's a
> >>>>>problem in between.  You may indeed have a bad
> >>>>>switch (you should
> >>>>>have plenty of spares in your depot).
> >>>>>
> >>>>>Best of luck.
> >>>>>
> >>>>>Ingo
> >>>>>
> >>>>>On Oct 10, 2007, at 2:44 PM, Ron Wainwright
> >>>>>          
> >>>>>
> >>>wrote:
> 
=== message truncated ===



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