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ABS/Brake Light/Speedo Needle Going Whacky

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Old 01-02-2013, 04:50 PM
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ABS/Brake Light/Speedo Needle Going Whacky

Just started. Cold weather starts. ABS Light and brake light comes on after ignition. Sometimes goes out after warming up. As long as they are on, the speedo needle drops to zero, swings to seventy and then back to normal speed and continues until fully warm. Ideas?

1998 24v Cummins 5.X Turbo

On a side note... loss of power hot or cold after 20 mph then not kick down at trans. Thinking a restricted fuel flow? Idles fine and runs great at low speeds. No smoke of any kind. Thanks for the help.
Old 01-02-2013, 05:02 PM
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Think maybe it's a rear axle speed sensor?
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