This afternoon driving home from work I noticed my left Daytime Running
Light was out. (Saw the reflection in a vehicle in front of me at a stop
Exactly how do you check the light? The bulb appears to be OK but the only
way the lights are on is when you are driving. Putting the vehicle in park,
the lights go out. Putting the emergency brake on and the truck in drive,
the DRL's don't come on.
I pulled the vehicle in the garage and could see on the wall the left DRL
was not on. But I would like to check the voltage at the plug to make sure
it is getting power.
I would take the bulb out and check it for continuity, chances are it's just
the bulb. GM changed the bulb number to use at least once because they were
burning out so fast, so don't go by your owners manual or the number on your
old bulb for the replacement.
Bottoms Up Divers
It is likely the bulb, swap them from side to side and see what
happens. Also My daughter has a 97 Saturn and the DRLS are on as soon
as you switch on the key and on my 2000 K3500 old style truck they did
the same untill I disabled them.
Use a set of wheel chocks in front and behind the tire. Turn the key on,
shift to neutral. You don't have to start the truck. Rest assured that the
bulb is bad. I always see someone with one of them out. I changed mine to
4157LL amber. They lasted 14 months before one burned out. I changed them
Doing a little more research waiting for the storm to blow over. The 4157K
bulbs which came standard are now being replaced by 4114K bulbs.
I found this out at: http://www.acdelco.com/html/pi_main_new.htm
Fairly cool site, go to parts catalog and enter vehicle information. ALL
parts for your vehicle are listed.
These lights burn out when the wind blows...haven't you noticed all the one
eyed chevy's coming down the road at you?
The entire drl system is a design flaw...they all leak water after a while;
when you notice your bulbs burning out after a few months, moisture is the
culprit. Then you need to replace the entire lens housing.
There are two metal rods that hold in both the headlight and drivers light
housing; remove both rods (they are on top of the headlight housing, you
have to open the hood to access) then simply replace the bulb. I have it
down to a science...I can pull the housings and replace a bulb in about 20
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