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 Post subject: Fault finding brake pad light help needed
PostPosted: Sun Oct 25, 2015 3:32 pm 
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Joined: Thu Apr 17, 2014 1:59 pm
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Hi all,

I've got an intermittent brake pad light coming up on the dash.
New abs unit and brake pads in last few months so likely not that.

How can I find out what it is with my multimeter?
I've cleaned up the earths on the wear cable as these were awful!


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 Post subject: Re: Fault finding brake pad light help needed
PostPosted: Sun Oct 25, 2015 4:33 pm 
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Location: Peterborough
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I'd have a good look at the cables and make sure they're not cut/damaged anywhere 1st.

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 Post subject: Re: Fault finding brake pad light help needed
PostPosted: Mon Oct 26, 2015 9:19 am 
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What's the method for checking the wire? I assume if I pull out the wear cable from the connector i can test both the cable, and the connections to the fuse box in the same process?

If I connect my mulitmeter to the end of the wear cable am I looking for a continuous circuit with the cable?
What should I be looking for with the connector box? Assume I'm looking for 12v? (i.e. where the wear cable plugs in)

Thanks all.


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 Post subject: Re: Fault finding brake pad light help needed
PostPosted: Mon Oct 26, 2015 10:01 am 
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Joined: Sun Nov 04, 2007 7:43 pm
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The wear indicators are a wire loop. WHen the pad runs out it wears the loop & then breaks the wire. TBH on a well maintained car I would bin then & loop them out. Which is what I did with mine.

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 Post subject: Re: Fault finding brake pad light help needed
PostPosted: Mon Oct 26, 2015 10:45 am 
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Thanks, I understand that they break their circuit when they wear.
All my pads and discs are new and i've renewed the earths on the abs / wear cable unit.

How can i check the cable and rule this out with a multimeter? And similarly how can i check the other wiring. Fault is intermittent but light is on 80% of the time.


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 Post subject: Re: Fault finding brake pad light help needed
PostPosted: Mon Oct 26, 2015 12:10 pm 
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if you have had all the sensors out of the plastic blocks make sure they are all clean and good contacts inside.

a crusty pin would cause a problem

also im not sure they need to be broken just grounded out is enough i think

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 Post subject: Re: Fault finding brake pad light help needed
PostPosted: Sun Nov 01, 2015 10:27 pm 
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Joined: Thu Jul 28, 2011 9:37 pm
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Quote:
if you have had all the sensors out of the plastic blocks make sure they are all clean and good contacts inside.

a crusty pin would cause a problem


I'll go with that, changed my pads and sensors this year and they have taken a few hundred miles to settle down.

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 Post subject: Re: Fault finding brake pad light help needed
PostPosted: Tue Nov 03, 2015 11:02 pm 
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Location: Warwickshire
Did you change the sensors or at the very least clean them?

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