Day time running lights

This topic contains 2 replies and was last updated by mark-parsons-2 8 years 2 months ago
Author
mark-parsons-2
July 7th, 2013 7:36pm
Post
Not a dozer,it's a 2007 Sterling 9500 tractor.Day time running lights on at all times,regardless of park brake status.I have to pull headlight fuse at under hood fuse panel at fender to shut off.Headlights work normally with switch.Tried pulling DRL relay-no change.Tried good DRL module from another truck-no change.Found several air PSI switches,one fed from delivery line off park brake valve-I verified it changes from open to closed depending on presence of air PSI.Also,park brake indicator on dash goes out with park brake released.Any help would be greatly appreciated.
jbone
July 8th, 2013 5:09pm
I take it the lights stay on even with the ignition key off? Otherwise I think it is normal for the daytime running lights to be on regardless of park brake switch status. So if the ignition key is on, the lights will be on.



If there is an issue it sounds like it is most likely happening before the headlight fuse. Those fuse panels are in a bad spot and are exposed to the elements. There could be an un-switched power source that has shorted to the daytime running light circuit, or perhaps the headlight switch itself is not turning off properly.
mrbigwrench
August 4th, 2013 2:41pm


mark parsons wrote:

Not a dozer,it's a 2007 Sterling 9500 tractor.Day time running lights on at all times,regardless of park brake status.I have to pull headlight fuse at under hood fuse panel at fender to shut off.Headlights work normally with switch.Tried pulling DRL relay-no change.Tried good DRL module from another truck-no change.Found several air PSI switches,one fed from delivery line off park brake valve-I verified it changes from open to closed depending on presence of air PSI.Also,park brake indicator on dash goes out with park brake released.Any help would be greatly appreciated.


Sounds like everything's working fine, where's the problem?

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