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front brake pad wear sensor (as well as rear sensor) has only 2 wires which is one pair. when those two wires are shorted to each other, the system will think that the brake pad indicator is functional - when the pads wear too thin, the rolling rotor cuts through the metal of the sensor and thus interrupts the integrity of the connection...
You mentioned THREE wires - not sure which ones you are talking about...
when i buy pads, i also buy the sensors to go along with them, it is much easier, even if the original sensor is still good, you just replace it along with the new pads... not sure how much it is in Panama, but sensors cvan be had for under $10... I don't think you can get them at the Colon though, or at Albrooks mall... mail-in orders only...
I had a tire blow out once in Panama, and it was hard to find a tire in 20" for my X5 - but I was lucky and found one...
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