delay wipers

  1. P

    Wipers run backwards

    Rebuilt 85 K20- with painless wiring harness. All works as it's supposed to even delay but wipers actually run backwards. When shut off they park in the up position. I suspect a wiring issue but I can't find a definitive diagram of wiring. Any ideas? Thanks for the help. Paul
  2. R

    Delay wipers

    I'm adding delay wipers and I think I'm having the same problem I had when I undertook this endeavour with a 78 Corvette. The truck is a 78 GMC and never had delay wipers. I added the switch and the delay box but still no fun. Everything works but the delay. I read in the 78 shop manual that a...

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