Wipers Won't Park
A couple weeks ago had to drive in a light rain with the '67. Put the wipers on for about 3 sweeps and turned off to clear water from w'shield. Did this about 4 times with no problem, then on next cycle wipers would not park. Tried cycling the wiper switch a few times with no luck. Then after driving about 10 minutes, wipers stopped working! Got to my destination after about 20 minutes of total driving & immediately checked the. Naturally it was OK. I then decided to take the cave man approach and turned ignition on, grabbed the wiper arm and gave it a slight tug and the wipers started working, but still would not park. After about 5 hours I drove home without cycling the wipers and parked in my driveway. Went out about 1/2 hour later to pull the car into the garage, turned ignition "on" and wipers parked!
So, after all this I decided to remove and clean the contacts on the wiper switch. Checked the switch before disassembly and it seemed OK, but took it apart anyway and cleaned contacts (no problems noted), reassembled and installed in car. Cycled wipers a few times, shut off, and wipers would not park! Now, here's something strange (at least to me), I noted before the test that the ammeter was at "0" with the ignition in "accessory" and before cycling the wipers. After the test there was a slight current draw still in accessory position. Turned ign. to off and left the car for about 1 hour. I know that the windshield motor is grounded in a couple spots, so pulled the black ground spade connector on the front of the motor to check it's continuity and it seemed OK, but made sure as best I could that the wire wasn't holding on by a strand and reinserted on the motor spade lug. Turned ignition on and the wipers parked!
I decided not to fiddle with the wiper motor until it's about time to put it away for the winter in about another month. Not looking forward to pulling the motor, but will have 5 months to play with it on the bench. By the way, the wiper motor was professionally restored about 9 years ago, and in that time worked fine about a dozen times (total run time maybe only 3 hours).
Any ideas on what could possibly be going on here would be greatly appreciated.
So, after all this I decided to remove and clean the contacts on the wiper switch. Checked the switch before disassembly and it seemed OK, but took it apart anyway and cleaned contacts (no problems noted), reassembled and installed in car. Cycled wipers a few times, shut off, and wipers would not park! Now, here's something strange (at least to me), I noted before the test that the ammeter was at "0" with the ignition in "accessory" and before cycling the wipers. After the test there was a slight current draw still in accessory position. Turned ign. to off and left the car for about 1 hour. I know that the windshield motor is grounded in a couple spots, so pulled the black ground spade connector on the front of the motor to check it's continuity and it seemed OK, but made sure as best I could that the wire wasn't holding on by a strand and reinserted on the motor spade lug. Turned ignition on and the wipers parked!
I decided not to fiddle with the wiper motor until it's about time to put it away for the winter in about another month. Not looking forward to pulling the motor, but will have 5 months to play with it on the bench. By the way, the wiper motor was professionally restored about 9 years ago, and in that time worked fine about a dozen times (total run time maybe only 3 hours).
Any ideas on what could possibly be going on here would be greatly appreciated.
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