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When truck is idling or driving down the road at 70 the lights slightly dim back and forth. With a fully charged battery I will also sometimes walk out trying to start it and it tries to act like it has a dead battery. Does anyone know what could cause that?
the first thing i would check is the battery cables - a bad cable (probably ground) can make it seem like a dead battery, and hey - cables are not expensive! then check v.r.