Would need to scan vehicle to insure the wiper speeds are controlled by the General Module or a wiper intermittent relay....if relay...would locate and replace...if general module.....a reprogram or software update could be in order...possibly replacement.
Scott, Porsche Master Tech 35 years
Having windshield wiper/washer problems? Here are some more common problems.
The wiper motor is commonly replaced and was often not the problem. Don't replace the motor yet. maybe it's not the motor. It could be a fuse or something at the wiper switch. The wiper motor has two windings, fast and slow. The wiper switch sends a ground signal to each motor winding. More often, there are problems with the relay, or at the wiper switch, or in the cable to the motor.
Don't be too quick to replace the washer pump. The problem is often just a clog in the sprayer heads. You can clean out the sprayer holes with a needle, some have two holes, so look closely. Hope this helps.
SOURCE: windshield wipers wont work
Can you here the motor running? If not maybe a fuse is blown or the wiper motor is bad.
Can you move the wipers by hand? If you can then the linkage either popped off or is broken.
SOURCE: 2000 Jeep Cherokee Sport, window washing does not work
the little pump inside the washer fluid reservoir is bad, replace it
SOURCE: Windshield wipers go full speed on intermittent setting
Sounds to me like the person you talked to was probably just a service writer who has no clue. That would either be a body control module malfunction, or a bad wiper switch. The wiper switch would be a more likely cause.
SOURCE: My 2005 Jeep Grand Cherokee's windshield washer is not working.
Check power at the pump motors. You may not see a fuse because some run off a circuit breaker. If all else fails, a bit "backyard" but you likely could break out the washer pumps from the system and make a simple push button on the dash to operate them.
SOURCE: where is the intermitant wiper control modual
its a electronic board in back of wiper motor/ comes with new motor. just replace motor.
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