Our '89 GV has two separate motors for the windshield wiper blades. They do not synchronize wipe like modern vehicles.
Drives me a little nuts when this happens and it isn't a long trip to drive me totally crazy (the DW says), so I wonder if anyone ever resolved this issue and now has synchronized wipers on the old coaches.
I am not aware of that being done. I would think that would have to be someone with a lot of knowledge about 12 volt motors.
Hmmm, it has been several years since I had to mess with a wiper motor on a car, but it seems to me that the last one I dealt with had only one motor that drove both wipers. If you look at the larger vehicles (trucks and busses) they all have two motors, one for each wiper. I think you will just have to live with having two motors unless you have lots of money to invent something new.
I've never heard of 2 motors being synchronized.
Ours is a two motor set up and synchronized to start and stop together. Having said that, the PO had replaced the drivers wiper and shared that it was a pain to get the wiring right. It's not a simple two wire set up. As i recall anyway, it's been a while since I've been in that area of the coach. I can tell you that they travel right to left together and stop and start together but one lingers at the stop start position a little longer but then travels just a bit faster across the window .... Not perfect but close enough.
For us we try to avoid driving at nite and rain anyway.
Our GV wipers were never quite in sync.