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So while changing the oil on my 17’ Z06 (recently purchased) I noticed these red wires disconnected on both front tires. Any info on which wire this is and where it needs to be connected too? Could this be why my TPMS light is constantly flashing?Thanks in advance!
Not certain, but that shape suggests that it's a brake pad wear sensor.
I agree somebody decided not to attach the brake pad wear sensor to the brake pad. Your car may be a Z07 since all of the Z07s come with Carbon Ceramic Rotors. Looking at your picture it looks like the rotor has holes in its surface like the CCM rotors have. The CCM rotors are easy to damage, aren't repairable and very expensive (figure $2K per rotor) so it is crucial the pad wear sensor is mounted to the pad so you know the pad is worn before it ruins the rotor. There is supposed to be a bracket that holds the wire to the caliper so the sensor stays in place on the pad. My sensor wiring harness is black and I have never seen a red one before.
The wear sensor and its wiring do not affect the TPMS whether or not the wire is in its proper place. The TPMS has a wireless connection to the car. The TPMS flashing may be caused by a low battery in one or more of the sensors, incorrect sensors installed in the wheels or there is something wrong with the car electronics that receive the TPMS signal. From the looks of the caliper the car has seen some track duty as street-driven CCM brake cars don't usually generate that kind of dust.
Bill
Last edited by Bill Dearborn; May 15, 2023 at 11:03 PM.
Frankly, I would pull the wheels and investigate what pads you have installed and make sure they are compatible with ceramic rotors and installed properly. When I see shoddy work like the sensor just hanging free, I suspect there are other issues. Unfortunately, I’m usually right.
So while changing the oil on my 17’ Z06 (recently purchased) I noticed these red wires disconnected on both front tires. Any info on which wire this is and where it needs to be connected too? Could this be why my TPMS light is constantly flashing?Thanks in advance!
I agree somebody decided not to attach the brake pad wear sensor to the brake pad. Your car may be a Z07 since all of the Z07s come with Carbon Ceramic Rotors. Looking at your picture it looks like the rotor has holes in its surface like the CCM rotors have. The CCM rotors are easy to damage, aren't repairable and very expensive (figure $2K per rotor) so it is crucial the pad wear sensor is mounted to the pad so you know the pad is worn before it ruins the rotor. There is supposed to be a bracket that holds the wire to the caliper so the sensor stays in place on the pad. My sensor wiring harness is black and I have never seen a red one before.
The wear sensor and its wiring do not affect the TPMS whether or not the wire is in its proper place. The TPMS has a wireless connection to the car. The TPMS flashing may be caused by a low battery in one or more of the sensors, incorrect sensors installed in the wheels or there is something wrong with the car electronics that receive the TPMS signal. From the looks of the caliper the car has seen some track duty as street-driven CCM brake cars don't usually generate that kind of dust.
Bill
I appreciate you taking your time to write up that post! Very informative. I will get the car back up and look at all the pads! Thanks!
Frankly, I would pull the wheels and investigate what pads you have installed and make sure they are compatible with ceramic rotors and installed properly. When I see shoddy work like the sensor just hanging free, I suspect there are other issues. Unfortunately, I’m usually right.
my thoughts exactly! I will need to get the car up and check all the pads! Thanks!
Question. How does the brake wear sensor work? Doesn't it work by grounding? IOW, go low enough and it wears to the metal part which completes the circuit by grounding itself to the rotor? In which case, it shouldn't trip a light unless it is grounded.
When the sensor registers an “open circuit”, the computer lights a warning light to inform the driver that the brakes need replacing. I believe around 100 miles left at that point
When the sensor registers an “open circuit”, the computer lights a warning light to inform the driver that the brakes need replacing. I believe around 100 miles left at that point
If that is the case, it should not light up on the dash since it isn't wearing out.
The TPMS monitor light on the instrument panel may be flashing and showing no pressures because the TPMS units are not installed on the wheels or are not programmed.
Did the TPMS system work when you purchased the car?
Red sensor wire behind front wheels?
