My rear wiper hasn't been functioning well for a while. Previously, during the early summer, it would run "normally" at the various settings but as the summer went along, it basically would move verrrrryyyy sssssllllllooooowwwllllyyy along regardless of the setting. It got to the point where it moved up about 6-12 inches and stop. I could not move it manually. However, it seemed to function in some form to park....ie. moving the switch to off appears to cause it to park normal even if it is stuck going up.
Hence, my question is what is the difference in the park function that appears to operate well while the "forward" motion doesn't. How does the "transmission" determine the park operation requirement versus a normal "back and forth"?
Of course, the other comment is ... wow are wiper motors expensive... :-(
I got the trim off and have inspected wiring along the route... doesn't appear to be any issue although there seems like some "funkiness" with some black tape in places, then gray / brown tape here and there, especially near "anchor points"... maybe someone has been chasing this before (I have only owed this vehicle for 3.5 years).
Anyways, comments on the operation would be appreciated. I am going thru the gm manual to look at the section on troubleshooting. Will get the meter out and check the conditions on the three wires... battery, ground and "pulse ground / control". My original limited understanding was the "pulsed ground" provided speed control, not sure how this can be used for "park command" but maybe solid is park.
Hence, my question is what is the difference in the park function that appears to operate well while the "forward" motion doesn't. How does the "transmission" determine the park operation requirement versus a normal "back and forth"?
Of course, the other comment is ... wow are wiper motors expensive... :-(
I got the trim off and have inspected wiring along the route... doesn't appear to be any issue although there seems like some "funkiness" with some black tape in places, then gray / brown tape here and there, especially near "anchor points"... maybe someone has been chasing this before (I have only owed this vehicle for 3.5 years).
Anyways, comments on the operation would be appreciated. I am going thru the gm manual to look at the section on troubleshooting. Will get the meter out and check the conditions on the three wires... battery, ground and "pulse ground / control". My original limited understanding was the "pulsed ground" provided speed control, not sure how this can be used for "park command" but maybe solid is park.