All,
I have a new-to-me issue that is becoming more frequent. The wipers on my 1974 FJ40 don't like to stop when I push in the wiper switch. The switch in the dash is a new OEM switch and the ground appears good, so I'm assuming the issue isn't there. All other functions work well. Park, Lo, Hi, and Wash. Just not stop. The issue just recently cropped up and went from intermittent to frequent. At first I thought it was lack of use and a touch of corrosion. I carefully removed the "unobtainium" Park Switch cover (first image below). Everything looked ok to me. I carefully cleaned the contact points with a bit of sandpaper, but that seems to have no effect.
The only additional clue I have, is that if I cut power (i.e. ignition key to off) with the wipers in the park position - they park. And if the wipers do, by chance, stop when I push in the dash switch - they park. I'm thinking this is a ground issue somewhere and perhaps the Park Switch is the wrong place to be. I have a “stop” issue, not a “park” issue now that I think about it.
The second and third photos below are the wipers in the parked position. The final photo is the same switch with the wipers sweeping in the down position.
I've searched here and couldn't find anyone with the same issue. I've also read @Coolerman excellent "Wiper Science" post. Any ideas what else to look for before I have to remove the system and take it to the work bench. Hate to do that if its something simple (or nothing to do with the wiper motor) since the system is otherwise working well and adjusted.
Thanks...
I have a new-to-me issue that is becoming more frequent. The wipers on my 1974 FJ40 don't like to stop when I push in the wiper switch. The switch in the dash is a new OEM switch and the ground appears good, so I'm assuming the issue isn't there. All other functions work well. Park, Lo, Hi, and Wash. Just not stop. The issue just recently cropped up and went from intermittent to frequent. At first I thought it was lack of use and a touch of corrosion. I carefully removed the "unobtainium" Park Switch cover (first image below). Everything looked ok to me. I carefully cleaned the contact points with a bit of sandpaper, but that seems to have no effect.
The only additional clue I have, is that if I cut power (i.e. ignition key to off) with the wipers in the park position - they park. And if the wipers do, by chance, stop when I push in the dash switch - they park. I'm thinking this is a ground issue somewhere and perhaps the Park Switch is the wrong place to be. I have a “stop” issue, not a “park” issue now that I think about it.
The second and third photos below are the wipers in the parked position. The final photo is the same switch with the wipers sweeping in the down position.
I've searched here and couldn't find anyone with the same issue. I've also read @Coolerman excellent "Wiper Science" post. Any ideas what else to look for before I have to remove the system and take it to the work bench. Hate to do that if its something simple (or nothing to do with the wiper motor) since the system is otherwise working well and adjusted.
Thanks...
Last edited: