Wipers and brake light
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New User
Joined: Sep 2020
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Wipers and brake light
First attempt at gaining a little knowledge here !!
This morning I noticed upon starting (2020 7.3 CCLB) the brake light was on - no park brake set - and the wipers wouldn't work. After driving about a quarter mile, the brake light went off and wipers engaged and worked. Got to work, waited 15 minutes, repeated the process and VOILA !! Same issue.
Damaged Fuse ? Relay ? Am doing a little reading once i get the time today, but i figured the smartest Super Duty guys are all right here !!
Thanks in advanced....
This morning I noticed upon starting (2020 7.3 CCLB) the brake light was on - no park brake set - and the wipers wouldn't work. After driving about a quarter mile, the brake light went off and wipers engaged and worked. Got to work, waited 15 minutes, repeated the process and VOILA !! Same issue.
Damaged Fuse ? Relay ? Am doing a little reading once i get the time today, but i figured the smartest Super Duty guys are all right here !!
Thanks in advanced....
Cargo Master
Joined: Oct 2015
Posts: 2,745
Likes: 72
From: West Virginia
Do you have anything plugged in to the OBDII port? If I leave my Sprint WiFi module plugged in too long, it messes with the trucks computers and I get all sorts of false alarms. If I unplug it once every couple months or so for just a couple hours of driving, I don't get any false alarms.
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New User
Joined: Sep 2020
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Thanks for the reply !!
Nothing plugged in. I recall reading somehwere that in older Super Dutys there was a problem similar to this... Work has me SWAMPED today, trying to find the time to do a little research..
Thx
Nothing plugged in. I recall reading somehwere that in older Super Dutys there was a problem similar to this... Work has me SWAMPED today, trying to find the time to do a little research..
Thx
Fleet Mechanic
Joined: Mar 2021
Posts: 1,455
Likes: 607
I would guess your multifunction switch is bad. It's the whole wiper turn signal arm on your column. Pretty cheap part, I would start there and report back.
Tuned
Joined: Jul 2005
Posts: 424
Likes: 70
From: Somerset NJ
Me again... Still having issues. Took it to the dealer, damn brake light went off the minute I drove onto their lot. Had it a few days,
couldn't find anything wrong. Turned out of their lot onto the highway, brake light came back on, no wipers. I also noticed that
when the brake light is on and the wipers are not working, my A/C blower panel lights all work but the blower itself is not working.
About ready to trade the damn thing in... Anybody else seen this issue?
couldn't find anything wrong. Turned out of their lot onto the highway, brake light came back on, no wipers. I also noticed that
when the brake light is on and the wipers are not working, my A/C blower panel lights all work but the blower itself is not working.
About ready to trade the damn thing in... Anybody else seen this issue?
More Turbo
Joined: Feb 2009
Posts: 635
Likes: 13
From: Mt. Salem, NJ
Me again... Still having issues. Took it to the dealer, damn brake light went off the minute I drove onto their lot. Had it a few days,
couldn't find anything wrong. Turned out of their lot onto the highway, brake light came back on, no wipers. I also noticed that
when the brake light is on and the wipers are not working, my A/C blower panel lights all work but the blower itself is not working.
About ready to trade the damn thing in... Anybody else seen this issue?
couldn't find anything wrong. Turned out of their lot onto the highway, brake light came back on, no wipers. I also noticed that
when the brake light is on and the wipers are not working, my A/C blower panel lights all work but the blower itself is not working.
About ready to trade the damn thing in... Anybody else seen this issue?
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Fleet Mechanic
Joined: Jul 2008
Posts: 1,937
Likes: 1,221
From: Southern Crescent
These trucks do not like weak batteries. Have yours load tested. If you have 2 batteries, disconnect them and test individually. You favorite auto parts store should be able to do that, no need to wait on the dealer.
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