Re: Only Highs...no lows.
If unhooking the battery fixed it that means the bcm had a glitch in it and it may happen again. Many module can be reset by removing power to them, sometimes they continue to work for years, sometimes they just fail again.
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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