Brake lining warning light.
Moderator: martauto
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Laddie1997
- E30 Zone Newbie

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2000 miles ago I changed front and rear pads on my E30 convertible. Warning light came on yesterday, Checked and pads are fine, but one of the wires into the rear sensor is broken. Does this mean the warning system is activated by both a closed circuit (pads worn) and an open circuit as in this case a broken wire?
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whipsey
- E30 Zone Addict

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i kinda remember the same happening to mine cant remeber if the sensors are built into the pads though if there seperate might be worth changing for peace of mind
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Brianmoooore
- E30 Zone Team Member

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If wire is broken on rear sensor, then you need a new one.
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Globulator
- E30 Zone Regular

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Yes.Laddie1997 wrote:Does this mean the warning system is activated by both a closed circuit (pads worn) and an open circuit as in this case a broken wire?
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"No Mr Bond, I expect you to tell me why your 4 litre, 282bhp sports car can't outrun some lardy old Mercs.."
Audio & electronic software: http://www.cutestudio.net
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Brianmoooore
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Or a short to earthGlobulator wrote:Yes.Laddie1997 wrote:Does this mean the warning system is activated by both a closed circuit (pads worn) and an open circuit as in this case a broken wire?
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Brianmoooore
- E30 Zone Team Member

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If a sensor wire is broken from sn otherwise undamaged sensor, the usual cause is incorrect roting of the wires, leaving them too tight initialy.
As the pad wears and moves in, the wire becomes tight, and eventually brakes.
On the other hand, leaving too much slack can result in the wires rubbing through on the inside of the wheel well.
As the pad wears and moves in, the wire becomes tight, and eventually brakes.
On the other hand, leaving too much slack can result in the wires rubbing through on the inside of the wheel well.
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Brianmoooore
- E30 Zone Team Member

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This should all be in tech help as well, so it's having a move.
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Laddie1997
- E30 Zone Newbie

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Thanks guys for all the input. Super forum!
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delphini
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Well laddie unless you're an old codger or ebenezer the geezer ive heard of fellows either removing the lght bulb or closing the circuit closer to the irewall bulkhead .yes in essence this disables the system but if you love your car you probably look at the brakes ofen anyew right?
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Lordschleife
- E30 Zone Squatter

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A new wear sensor is only £2odd from ECP thoughdelphini wrote:Well laddie unless you're an old codger or ebenezer the geezer ive heard of fellows either removing the lght bulb or closing the circuit closer to the irewall bulkhead .yes in essence this disables the system but if you love your car you probably look at the brakes ofen anyew right?
Some pikey previous owner had cut the wires short and soldered them together on my rear sensor
Cheers,
Robin

Robin

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Brianmoooore
- E30 Zone Team Member

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Fairly common I'm afraid. Delphini's not the only one.Lordschleife wrote: Some pikey previous owner had cut the wires short and soldered them together on my rear sensor
