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International Automotive Technicians Network
Re: Check engine light and poor performance SPN 84
Posted to HD/Fleet Forum on 2/9/2018

Sounds like it is intermittent, which obviously is a pain in the culo.

Jack up a wheel, put your meter leads across the WSS pigtail with it plugged in, and spin the wheel. 1 revolution per second should give you about 3/10 of a volt.

How many speed sensors... Login to read more.