My 1998 Venture wipers will not lay down when I shut them off. I caused the problem when I took the wiper motor off to replace the
windshield wiper solution tank off. I moved the "transmission" arm on top of the wiper motor when I removed the tank, and now the wipers will not lay down. How do I time them correctly?
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Re: Timing Venture wipers
Disconnect the wiper transmission from the motor, then run the motor and turn the motor off with the wiper switch, this will park the motor, re-attach the wiper trans linkage so the wipers are parked/down
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Look online for the wiper module for this model. This is a common issue to include operation without the switch being activated. Everything is controlled by the module which screws directly on the front of the wiper motor by 3 torx head screws and measures about 4" x 4" and is very easy to install. The motor should be on the firewall. The modules run anywhere between $35 and 65. Let me know if you need anything else.
Check that you have connected the wiper motor correctly - ensure that you havent inadvertently got the polarity wrong!.
Leave the wiper arms off until you get the motor to run and park using the normal wiper on/off switch.
The motor 'park' control switching is normally an integral part of the motor drive gear and is not adjustable.
During your testing, affix a temporary indicator pointer to the end of a wiper arm drive shaft (use masking tape or similar) to prevent damage to motor or levers.
The problem is in the wiper motor assembly. Did you ever notice that when you switch the wipers off they always go back to the home position? This is due to a switch that keeps the wiper motor operating until the wipers are parked. In many older GM vehicles this is accomplished with a leaf type switch which opens when the wipers are in the correct position. when the dash switch is turned on this switched is bypassed keeping them on-when the wipers are turned off the motor continues to operate until this connection is broken.
Inside the wiper motor housing there is a nylon gear that drives a cam that cycles the leaf switch-most likely the gear has become damaged so it no longer drives the leaf switch allowing the switch to remain closed. A cheap fix is to disassemble the motor unit and piece of tape between the contacts. Although the wiper will not park properly they once again can be controlled by the dashboard switch.
In later vehicles the wiper position is located with an electronic sensor with a small PB board - the repair of this gizmo is beyond the scope of most shade tree mecahnics - so the solution is to replace the entire wiper motor assembly - unfortuneatly.