SL280 wiper problem
 

Hi Guys, im a new member and i was wondering if anyone had come a cross a problem with my wiper system!

its SL280 1993, my problem is, that the wiper motor only works on fast speed only! the intermittant and first speed does not work, i have changed the control arm and have just changed the motor itself, but still no joy, this is proving expensive, has any one ideas please, kind regards

andy