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Old 21st March 2017, 08:05   #21
Rsnail
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Thank you guys but I can't imagine how the "tip" of the sensor can wear out, which tip are you talking about? There are only 2 plastic walls right and left next to a small metal piece, and with a small clip around the metal piece so that the sensor fits in, I can't imagine how the sensor itself would wear, isn't there a wire or a loop in the pad that actually wears out and that breaks the continuity of the circuit? Because otherwise I can't figure out how that works based on what I've seen

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Old 21st March 2017, 08:14   #22
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Originally Posted by Rsnail View Post
Thank you guys but I can't imagine how the "tip" of the sensor can wear out, which tip are you talking about? There are only 2 plastic walls right and left next to a small metal piece, and with a small clip around the metal piece so that the sensor fits in, I can't imagine how the sensor itself would wear, isn't there a wire or a loop in the pad that actually wears out and that breaks the continuity of the circuit? Because otherwise I can't figure out how that works
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Old 21st March 2017, 14:40   #23
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Originally Posted by HarryM1BYT View Post
It is just a loop in and out of the pad, of thin wire, close to the metal base of the pad. Once the pad wears down to the loop, it breaks the loop and the light comes on. A useful bit of test kit would be two old sensors from a worn out pad, with the two wire ends just shorted, so you can plug them in in place of the suspect sensors. If all is well with the rest of the wiring - the light should then go out immediately. You could instead, simply use a pair of new pads complete with sensors, just plugged into the black sockets.

Or even link the two pins of the black socket at a pinch.
Ok so if it is the loop of wire in the pad itself that wears down as I was thinking and not the actual sensor itself that wears down, then why do people say that when you change the pads you should change the senors too? What is the point if they are not the wearable part and can be reused?

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Old 21st March 2017, 14:51   #24
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Ok so if it is the loop of wire in the pad itself that wears down as I was thinking and not the actual sensor itself that wears down, then why do people say that when you change the pads you should change the senors too? What is the point if they are not the wearable part and can be reused?
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Old 21st March 2017, 15:24   #25
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Sometimes if i hit a pot hole my pad indicator comes on once the car is turned off and restarted later on the warning has gone until the next pothole sets it off!
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Old 21st March 2017, 16:23   #26
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Sometimes if i hit a pot hole my pad indicator comes on once the car is turned off and restarted later on the warning has gone until the next pothole sets it off!
Surely a poor conection somewhere in the circuits front /rear

see preferably connector's pins
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Old 21st March 2017, 17:11   #27
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What is the point if they are not the wearable part and can be reused?
As in FrenchMike's picture. The sensor clips in to the pad, and as the pad wears away, so does the tip of the sensor, and eventually reaches the point where the wire loop in it is also worn away away and breaks the circuit, switching the warning light on.
Which is why a sensor cannot be reused once it has been worn away and the circuit broken.
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Old 21st March 2017, 22:29   #28
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Deductively coincidence aside. If you have been tinkering under the bonnet have you disturbed a connector or snagged the wire.
I once had a bent pin inside the connector not making contact, but the black plastic connector fitted together on its guides ok. 10 mins of head scratching then looked inside and saw the bent pin. Straightened it out with plastic tweezers
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