Pad wear light

Shocks, springs, anything to do with the running gear

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D9406
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Pad wear light

Post by D9406 »

For some time now I've had the pad wear indicator light on the dash come on every time I press the brake pedal. At first I thought it was pads and got a new set but when I removed the supposedly worn pads they were only half worn at most. Still, I fitted the new pads but the light still comes on. New pads were fitted a few months back and the wires were fitted into the connectors OK.
Fluid level is good. So what else can it be?
Thanks
Andy
1999 406 HDi 2.0 110 GTX Estate. 48k when bought, now 150K. Second owner, I've covered over 100k in it.
Clutch changed @110k, bottom pulley changed, cam belt changed, EGR blanked, cat removed, front springs changed.
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Doggy
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Re: Pad wear light

Post by Doggy »

I've seen this happen if the pad wear sensor wiring is damaged.
Also possible to have a faintly lit pad wear W/L if cable sheathing is damaged and it gets wet.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
D9406
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Re: Pad wear light

Post by D9406 »

I'll pull the wheels off and have a look at the wiring, clean everything off and check with a meter.
Funny thing is the light comes on even if the car is stationary, although engine vibration may be enough if it's a broken wire but if so I'd expect the light to come on regardless of whether the brake pedal is pressed or not.
Whilst driving the light never illuminates, only if pedal is pressed, even a little bit.
Andy
1999 406 HDi 2.0 110 GTX Estate. 48k when bought, now 150K. Second owner, I've covered over 100k in it.
Clutch changed @110k, bottom pulley changed, cam belt changed, EGR blanked, cat removed, front springs changed.
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steve_earwig
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Re: Pad wear light

Post by steve_earwig »

It seems the circuit is only live when the brake pedal is depressed.
Unskilled meddling sin©e 2007

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Doggy
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Re: Pad wear light

Post by Doggy »

Thanks Steve. I was wondering if that was the case but no longer have access to the diagrams. :(
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
PeterN
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Re: Pad wear light

Post by PeterN »

I'm surprised you still have them. don't think any of mine did. the wiring to them is very thin and brittle and thin and breaks very easily. Does not the handbrake use the same light?

Peter
GingerMagic
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Re: Pad wear light

Post by GingerMagic »

I thought the same thing Peter, but I'm sure the handbrake light is a red square with a P, the pad wear is an orange circle with dots where the pads sit...

Otherwise I would have suggested it's the handbrake switch playing up.
2003 2.2hdi estate - mine
1998 Volvo 940 auto estate - also mine
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PeterN
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Re: Pad wear light

Post by PeterN »

My memory is failing fast but I just had an idea that it was the same light - I'm sure someone will tell us.

Peter
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steve_earwig
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Re: Pad wear light

Post by steve_earwig »

I honestly can't remember but I do remember Welly going mental with his handbrake on his D9 so... maybe. It's the same type of switch as the glovebox light btw.
Unskilled meddling sin©e 2007

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D9406
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Re: Pad wear light

Post by D9406 »

The pad wear light is the orange light, the red light is for handbrake and brake fluid level if I remember correctly. I had an issue with the red light which was due to a faulty switch on the handbrake, can't remember the actual symptoms but replacing the switch solved it.
Not sorted my orange warning light yet, been busy painting the house.
Andy
1999 406 HDi 2.0 110 GTX Estate. 48k when bought, now 150K. Second owner, I've covered over 100k in it.
Clutch changed @110k, bottom pulley changed, cam belt changed, EGR blanked, cat removed, front springs changed.
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