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wipers not working - troubleshooting time

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bfit:
Matt you will get help here  as well
Australian Corvettes Association
http://www.australiancorvettesassociation.com/phpBB//index.php?sid=07b581072a72c957f50e57fa2c0eb875
Bfit

bfit:
I had to go an check the formula above,
  its been  long time since my school days
Bfit

sirfixalot:
Check to see if you have a positive on centre terminal of wiper motor  with ignition on if so then run a temporary earth & insert into either top or bottom terminal, motor should run.If no positive at motor check under column at isolator switch( if applicable) if power on both sides of switch, the next point to check positive is at micro switch for wiper door( if applicable).Depending on year model early C3 needs 2 positives to motor the heavy red single wire which comes from micro switch & goes into side of motor &  also a positive on centre teminal.
Next test connect test lamp from positive on alternator then connect other end to either of the external terminals on 3 pin plug & operate switch in car lamp should lite when switch operated.
If you have both positive & negative tests ok fault is in motor it will be the small white relay block located under spade connectors in motor.Motor has an internal relay for park mechanism the contact goes open circuit.This part can be replaced
 

Camo:
May or may not be of assistance.

Following for a 77 Corvette.

Best I could do with an A4 scanner scanning A3...


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Mattrix:
Awesome work guys! In a strange twist of fate, I was driving along the other day with my good luck charm (that being my new girlfriend, who seems to live a charmed life), and the wipers came on by themselves! They only ran till I turned the car off, but it was long enough for me to get the notion that the motor was OK.
Anyway, I pulled the wires off the back of the motor, and cleaned up the terminals. Lo and behold, they sprang to life. So that just makes one less headache for me to deal with (plenty of others though, such as leaking auto trans, air in brakes, driver door lock keeps playing up, front windscreen leaks, etc etc).
Thanks plenty for all your input!

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