67 Wiper Motor Runs Steady

[Dereck S.]

All
Around 8 years ago I purchased from a fellow enthusiast a fully restored wiper motor for my 67. He had it restored by a very reputable restorer but never installed it. Over this winter I decided to pull my fully functional but unrestored wiper motor and replace it with the purchased restored unit. Once installed, I powered up the ignition and the wiper motor started immediately with the wiper dash switch in the off position. It runs in the low speed mode. I turned the wiper dash switch to the low speed position and the motor continued to run in low speed. I turned the switch to the high speed position and the motor runs at high speed. The motor will not shut off when the dash switch is turned to the off position. I reconnected my original wiper motor unit and it works fine and shuts off with the dash switch. I concluded that the dash switch is not the issue. My next step is to begin to partially disassembly the restored unit in an attempt to determine why power to the unit is not shut off when the switch is turned to the off position. I've never taken a wiper motor apart before. I'll crack the Chassis Service Manual for guidance. I suspect the issue is related to the relay control. Any help isolating the issue as well as help with what I should focus on would be appreciated.
thanks
Dereck

[Page C.]

Re: 67 Wiper Motor Runs Steady

Sometimes the wiper motor will no go into the PARK position and continue to run because the grease has dried out in the motor housing. This will not let the mechanical linkage go into the PARK position even if the relay you mention is working properly.

[Richard G.]

[Duke W.]

Re: 67 Wiper Motor Runs Steady

All
I'll crack the Chassis Service Manual for guidance. I suspect the issue is related to the relay control.
Dereck

The wiper motor R & I procedure is in the CSM. The overhaul procedure is in the Chassis Overhaul Manual.

Duke

[Tim G.]

[Ernie F.]

Re: 67 Wiper Motor Runs Steady

http://repairs.willcoxcorvette.com/?yt=1966&s=wiper+motor

1963-1967-corvette-windshield-wiper-motor-and-washer-pump-rebuild

[Dereck S.]

Re: 67 Wiper Motor Runs Steady

Pulled the unit. Real pain. Removed the pump cover and immediately noticed one of the small springs was missing. I searched inside the unit assuming it had come off. It was nowhere to be found. The rebuilder must have forgotten it and likely not bench tested it. I took the spring from my original unit then bench tested it. Problem solved. Now I need to put it back in the car.
Dereck

[Richard G.]

Re: 67 Wiper Motor Runs Steady

Tim;
The 50 point hit on operations must have been 24 for the pump and 25 for the wipers, correct?

Just be happy the spring wasn't a motor brush spring. Getting them back in is a real pain in the....
I wouldn't recommend taking the motor cover off unless one is aware what they are biting off.
One needs to build a brush holder to reassemble the motor. It drove me to drinkkkkk.