I'm going to have some time off at the end of the week and wanted to tackle this nagging issue. When I set my parking brake valve, the light on the dash doesn't illuminate and my daytime running lights stay on. When I open the door the alarm chimes and flashes the park brake light as if to remind me to set the brake even though it's set. It doesn't do this every single time but majority of the time. I figure it's a pressure switch that controls it that's giving trouble. Does anyone know the location of these switches?
(03-15-2017 )Matt Wrote: [ -> ]I'm going to have some time off at the end of the week and wanted to tackle this nagging issue. When I set my parking brake valve, the light on the dash doesn't illuminate and my daytime running lights stay on. When I open the door the alarm chimes and flashes the park brake light as if to remind me to set the brake even though it's set. It doesn't do this every single time but majority of the time. I figure it's a pressure switch that controls it that's giving trouble. Does anyone know the location of these switches?
Mine does the same. When I set the parking brake, the parking brake light doesn't illuminate, unless I open the door then it comes on. Same as yours. It seems backwards to me as well. I have an 09 Kenworth t800.
Lol mine does too but sometimes it works fine
I've had to change this pressure sensor before. Open the right hand gauge panel and it's on the firewall basically in the center. It was too long ago for me to still have the part number, but it's not that tough.
It's round if that helps.
Park brake pressure switch. It's at the center of the firewall. You will need a crows foot, long extension and ratchet. 20 minutes and done
Awesome. That's the info I was looking for. I'll pop the dash panel off tomorrow and change it. Atleast now I don't have to spend time looking for it lol
(03-16-2017 )Matt Wrote: [ -> ]Awesome. That's the info I was looking for. I'll pop the dash panel off tomorrow and change it. Atleast now I don't have to spend time looking for it lol
Forget to say empty ur air tank. That switch is on a main air distribution aluminum box. Just for safety
Update for folks in the future:
Confirmed it was the round sensor, 2 terminals on it. spun it out and put a new one in, stopped the problem immediately..thanks for the advice!
What they said. On mine, my brakes would release but I'd get an alarm for the brakes being set randomly while driving. Loaded my drawers a couple times with that one.
Problem on mine was the valve was messing up. Had a dead air dryer which caused all sorts of nastiness in my air system.