Speed of wipers on 2002 Buick Park Avenue

Since I had the front bumper replaced the wipers speeds are not correct. When you go from low to lower the speed increases instead of decrease and there is no longer any wiper delay - is this just co-incidence or is the wiring near the bumper?

Asked by for the 2002 Buick Park Avenue
I think it's a coincidence, but anything's possible. You could have a wiper switch or motor problem, may have been caused by a collision - you've replaced the bumper for crash damage, I suppose..
Find an auto electrical shop or a GM specialist. These things are not hard to fix.
If you want to find a specialist, here's a directory link for you: