ACDelco 19177098 Wheel Speed Sensor Assembly

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Price: $125.75 $123.84   

Product Description

Wheel Speed Sensor Connector

ACDelco 19177098 Wheel Speed Sensor Assembly Review

ABS Code checks at my local Autozone narrowed my problem down to my left rear hub. The rear hubs on this 2002 Buick Lesabre have the speed sensors built into the hubs and it is the rotation of the speed sensor which provides feedback to the ABS controller. There are a number of conditions which can trigger an ABS code and in my case there was a fluctuation in the DC voltage going to the left rear wheel sensor. A quick way of checking the voltage at the sensor connector is to measure the voltage at both female connections in the harness which plugs into the sensor. If the vehicle has the original speed sensor connections, one wire will be black and one wire will be white. The DC voltage on the white wire side should be less than 4.0 V DC and the black wire may show just a trace amount of voltage less than about 0.04 mV DC. I had a steady 4.0 V DC on the right side hub, but the left side kept fluctuating between 2.0 and 4.0 V DC. Initially, I thought I had a bad speed sensor in my new left hub, so I replaced the hub under warranty. Nothing lost, since I can now change out a hub in 30 minutes or less! Thinking I had a bad Delphi connector, which after several hours of searching in the Delphi catalog ended up being Connector Body P/N 12052638, Connector Seal P/N 12048086, Terminal P/N 12048074, Lock P/N 12052634, and some 20 AWG black and white multistrand wire, I ended up soldering and crimping a replacement pigtail connector which actually fit the connector mounted on the wheel hub. I spliced in my replacement pigtail and hoped the ABS light would go off. After a short test dive to get over 5 MPH, I heard the familiar 'ding' of the ABS light coming on and I thought it was best to replace the enter wheel speed sensor assembly. Initially, I was going to pull out the existing wheel speed sensor wiring harness but since GM had mounted this wiring harness to the vehicle frame before they attached the body, I simply cut the old harness ends off and ran the new wiring harness alongside the existing wiring harness using wire ties to keep the new harness in place along the vehicle frame. I plugged in the new harness to the wheel sensors, took the car for a spin, and no more ABS or Traction control light. After dissecting the old wiring harness to get to the root cause of my intermittent voltage, I found that a previous vehicle owner had spliced in about a 6 inch section of larger gage wire into the white wire which was going to the left rear speed sensor. This additional resistance was enough to affect the voltage at the sensor which triggered the ABS code. This larger wire was spliced in about 10 inches beyond where I had made my splice joint and if I had found it earlier during an inspection of the wiring harness, my custom made pigtail would have fixed the problem. In the end the $90 I paid for a replacement wiring harness was worth the money since I have now learned so much about wheel hubs, ABS sensors, wiring harnesses, and Delphi connectors.

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