Last year, my car was hit in the right rear quarter panel and my trailing arm was damaged. The impact pulled the right axle out of the differential. The car is back together, but my speedometer doesn't work. The sensor is in the right rear of the differential, so that seems to be the right place to begin diagnosis.
My Bentley manual has almost no information regarding schematics of the wiring system from the speedo sensor to the instrument cluster, but I think (maybe) the circuit runs thru the main computer. It has no information regarding the inside of the final drive.
So far, I have pulled the sensor and it appears to be fine. The wires to the sensor look intact. I think that I may have damage in my the trigger for the speedo sensor that must be inside the differential, but I would like to confirm that I have current & continuity to the sensor first.
Does anyone know where there is a schematic of the wiring from the speedo sensor to the speedometer? I assume that with the ignition on, I should get 12 volts thru the red wire to the sensor. There is a second grey or brown wire to the sensor. What is that, to ground?
Does anyone know how to reach and check the trigger to the speedo sensor in the differential? Can it be seen by pulling the axle flange off of the right side?
I welcome anyone's knowledge about this.
My Bentley manual has almost no information regarding schematics of the wiring system from the speedo sensor to the instrument cluster, but I think (maybe) the circuit runs thru the main computer. It has no information regarding the inside of the final drive.
So far, I have pulled the sensor and it appears to be fine. The wires to the sensor look intact. I think that I may have damage in my the trigger for the speedo sensor that must be inside the differential, but I would like to confirm that I have current & continuity to the sensor first.
Does anyone know where there is a schematic of the wiring from the speedo sensor to the speedometer? I assume that with the ignition on, I should get 12 volts thru the red wire to the sensor. There is a second grey or brown wire to the sensor. What is that, to ground?
Does anyone know how to reach and check the trigger to the speedo sensor in the differential? Can it be seen by pulling the axle flange off of the right side?
I welcome anyone's knowledge about this.
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