The problem is that one day the low beam lights came on by themselves and will not go out?

VAN14DEE

MEMBER
13 POSTS

Here is how it started. One day the truck was just sitting and one minute all lights were off, then all of a sudden, without input, they came on (just the DRL, no other lights). I thought it was the low beams, but after checking things the other day, it appears to be the DRL.

The lights are on with no switches or lights turned on. No input whatsoever.

I can get the right DRL off by taking out fuses 46 or 47. The left DRL will not go out until I disconnect the battery or take out the bulb.

I removed fuse 7, 14, and 27 with no result. The lights stayed on.

SPONSORED LINKS

Was this

answer

helpful?

Yes

Monday, December 8th, 2008 AT 8:47 PM

IMPALASS

MECHANIC
3,112 POSTS

Hello -

Alright... Pull fuse 43 and see, then 45 and see, then the Fog Lamp Relay...

If that doesn't work... It may sound crazy... But will you swap the bulbs.........

That still doesn't say why there are both on... But just want to see if it moves...

Still looking at the wiring diagram to see what is there.

Let me know.

Was this

answer

helpful?

Yes

Monday, December 8th, 2008 AT 9:59 PM

VAN14DEE

MEMBER
13 POSTS

I removed F43 and F45. I see that f43 feeds the Fog lamp relay, but have to be honest and tell you I could not actually find the Fog lamp relay k26.

When F43 and F45 were removed, the DRL stayed on. Seems there was some difference in intensity of the light when I removed the fuses (got brighter).

I did cahnge the light bulbs, left to tirght. Lights stayed on. Then something very interesting happened: The left bulb was removed; F46 was removed so I could put the right bulb in place (rmoving f46 is the way I get the right DRL off); I inserted the right bulb and put it back in its socket; then I put f46 back in (usually this is when the DRL would come back on); This time though, the DRL did not come on. I inserted the left bulb; the DRL still did not come on; In other words all was fine; Then to test things I started the truck and turned the lights on; All lights came on, but when I shut everything off, the DRLs remained on (the same problem).

I tried to duplicate, but it did not work a second time.

THis thing is really messed up (I think)

Was this

answer

helpful?

Yes

Tuesday, December 9th, 2008 AT 12:29 PM

IMPALASS

MECHANIC
3,112 POSTS

Hello -

Well, my main program is not working right now so I am kind of at a stand still since I can not view the wiring diagram.

However, it does look like something is going on there.

Okay, look those connectors and sockets over really good for any burnt, bare wires, chaffing, corrosion, anything. You are getting power from something... That is specific to the left but not the right.....I say this because you can pull the fuses and the right go out but the left does not.

Sorry, I don't show where that Fog lamp relay is right now... You could contact the parts department and see if they can tell you. My thought is that that relay may be acting up since so many things run through it. I think, (I don't have the wiring diagram right now) but I think it has a separate wire that goes to the left lamp. So that is what I am trying to get to.

The other fuses take out the right... But if the relay is bad it may still be getting power and feeding the left lamp. BUT, if I remember correctly fuse 43 and 45 feed the fog relay....... So might the others though.........

Okay, try pulling one fuse at a time and see what happens and leave them out as you go. 7, 14, 19, 43, 45, 46, 47, 30.

If they go out, then turn the light on..... Then back off. Then plug in one fuse at a time in reverse order and the second they come on make note of that fuse. Then, do it again to ensure it is at the same spot.

Then pull all the fuses and then go from the top down...7, 14 etc. So, if say you put in fuse, 30, 47, 46, 45 and the lights come on, remove them and do it again.

Then with all removed put in 7, 14, 19, 43, 45 and the lights come on... Then we know whatever is going through 45 is the problem....... Maybe.

Was this

answer

helpful?

Yes

Tuesday, December 9th, 2008 AT 10:47 PM

VAN14DEE