[s-cars] Brake wear sensor question

[Ivan Demkovitch]

Ok. It's working.

1st I started to look for terminal on a right side where this wire coming
from. It looked like there is lot of stuff to take off..

Remember we were thinking that wire broken because I don't get 12V? Well.. I
decided to give it a try anyway.
I bought 1 feet of really thick wire with single wire size about as female
opening on those connectors.
Since I had 2 sides without sensors - I made 2 "U" peces and pushed them in.
Then I put electrical tape on top.
All that time I had ignition ON and it was showing (O). I turned ignition
off and back on - "OK" illuminated and after I started car light went off
WOW

So.. I have 2 explanations for 1V
1. computer sends signals periodically and this is not constant 12V
2. computer check them only when you turn key ON and then you don't get
anything.

Hope it helps somebody...

-----Original Message-----
From: LL - NY [mailto:larrycleung at gmail.com] 
Sent: Wednesday, June 01, 2005 6:26 PM
To: Ivan Demkovitch
Cc: Kent McLean; s-car-list at audifans.com
Subject: Re: [s-cars] Brake wear sensor question


If you're only getting ~ 1V, that lead is already (poorly) grounded. Check
both leads for 12V. If neither is getting at least 12V, then there is a
break further up the line. I'm dealing with that myself (when I find the
time) and if I don't get 12V at the connector, I'm banking on the break
being where the cable enters the 
engine compartment, which is where the wire is most stressed by bending. 

LL - NY

On 6/1/05, Ivan Demkovitch <idemkovitch at hotmail.com> wrote:
> Steel fighting that problem... Were looking at Bentley just to see 
> that left side connected to ground and then to the right side and then 
> to the computer... It made me think I should have juice on a right. 
> Started to test and found fluctuating ~1V at one of the pins.
> Shortening it to the ground would not turn off that brake lining light.
> Should it go off immediately? Wife was watching it while I was connecting.
> Light stays on..
> 
> Wiring seem to be solid all the way.
> 
> Any ideas?
> 
> -----Original Message-----
> From: Kent McLean [mailto:kentmclean at mindspring.com]
> Sent: Monday, May 30, 2005 8:08 PM
> To: Ivan Demkovitch
> Cc: s-car-list at audifans.com
> Subject: Re: [s-cars] Brake wear sensor question
> 
> 
> Ivan Demkovitch wrote:
> > Is there 2 front caliper sensors??
> >
> > Also, how do I know which pins? There is 3 wholes in connector. By 
> > just "looking" I seen copper in 2 of them. Is that correct 
> > approach??
> 
> Each pair of pads in a front caliper will have a sensor,
> so there is a sensor on the left front brake and another
> on the right front brake.  The circuit goes to the left
> front first, which is why that is the side you want to
> short to ground.
> 
> If you have a voltmeter, attach the negative lead to
> a good ground, then test the holes with the positive
> lead.  (Be sure the ignition is on, to provide juice
> to the circuit.)  One of the holes should show 12V.
> If not, then you may have a break in the wiring
> "upstream". As one lister said, look by the firewall.
> 
> If you don't have a voltmeter, a test light should
> also work. Ground one lead, then insert the other
> into each hole. The "live" terminal is the one that
> lights the light.
> 
> Whichever terminal has 12V, that is the one you want
> to connect to ground.
> 
> --
> Kent McLean
> '94 100 S Avant, "Moody"
> '89 200 TQ, "Bad Puppy" up in smoke
> '56 Austin-Healey 100 BN2, for sale
> 
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