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Needles freaking out... amp load?...

Discussion in 'GM Electrical Tech' started by K15 Blazer Guy, Jun 28, 2013.

  1. K15 Blazer Guy

    K15 Blazer Guy New Member

    It all started when i pinned my speedometer. it only goes to 85 on this truck.... i reset the computer but the needles still twitch and freak out when i add electrical load to the truck... headlights, AC, turn signals, electric fan etc. is this a relay/computer issue, or do i just need more juice from a high out put alternator?
  2. K15 Blazer Guy

    K15 Blazer Guy New Member

    also, no computer codes, but the ABS light is on... its been on for months

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