As you could guess from the title, my wipers suck. It takes bout 4 sec for them to make one pass in either low or high speed. Any ideas as to what the most common cause is? All of my linkage looks good, so it's either a voltage drop through the switch or the motor is going out. When you apply resistance to the arms they still move along. So far I am leaning towards a bad switch, but I hate shotgun troubleshooting. Thanks for any help.