17/08/2026 6:12 am
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Automotive Q&A
Active left-front wheel signal drops only while turning right
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A 2014 Buick Regal stores an intermittent left-front wheel-speed code. Bias voltage is 11.8 V on both front circuits and all speeds match in a straight line. During a slow right turn, the left-front signal drops out for less than a second. Moving the harness with the car stationary does not reproduce it.
How can the harness be loaded in a way that matches steering and suspension travel?
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18/08/2026 6:20 am
Support the vehicle safely and observe harness length and bend radius from full left to full right steering and through normal suspension movement. Scope the active-sensor current or voltage signal while a second channel monitors supply at the body-side connector. A dropout with stable supply at one side of a connector narrows the fault to the sensor lead or terminal.
Inspect clips that may have been installed on the wrong side of the strut. The stationary wiggle test often misses a conductor that opens only when steering tension and suspension droop occur together.
Topic starter
19/08/2026 10:25 am
The sensor lead had been clipped behind the strut bracket after a prior repair, leaving it tight on right turns. Two internal strands were broken. Correct routing and a new sensor lead produced a clean signal through full steering and road travel.