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Parking light will not turn off

Tiny
CHAD HINSON
  • MEMBER
  • 2009 CHEVROLET 1500
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 180,000 MILES
Just bought the truck listed above. I've had the truck 2 weeks now and this morning the driver side front parking light will not shut off. Tried to swap fuses and relays around to no avail. Any advice would be much appreciated.
Wednesday, July 1st, 2020 AT 4:14 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

I attached a portion of the wiring schematic below. What I need to know is if there are actually two bulbs that are on. The power supply comes one fuse that will turn several lights off if removed.

Let me know if there are two. Also, remove the bulbs and inspect the light socket and bulb to make sure nothing is causing a short.

Joe
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Wednesday, July 1st, 2020 AT 8:49 PM
Tiny
CHAD HINSON
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  • 6 POSTS
Yes, both top and bottom bulbs are illuminated on the driver side parking light only. I visually inspected the connectors but did not see any damage to them. All signs point to a bad ground. I have cleaned and polished the main ground that runs from the battery. Did not fix the problem. I am unsure where it may also be grounded. Is that something you can point me towards?
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Thursday, July 2nd, 2020 AT 11:37 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

If the lights are on, then it is a short to power. Something is providing power to the lights that shouldn't be. The ground is good otherwise, the lights wouldn't work.

If you remove the parking light fuse, do they turn off?

Joe
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Thursday, July 2nd, 2020 AT 8:21 PM
Tiny
CHAD HINSON
  • MEMBER
  • 6 POSTS
I have removed every fuse or relay that is associated with the parking lights and headlights. Just removing them had no affect. Have not tried to replace any of them yet. I have not messed with any of the switches under the dash yet, but if it was a switch or a fuse. Wouldn't that's leave more than one light on. The switches, fuses, and relays control more than one light. If they were bad shouldn't a taillight be on as well as the front?
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Friday, July 3rd, 2020 AT 6:30 AM
Tiny
CHAD HINSON
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  • 6 POSTS
Is the diagram attached for the fuse panel under the hood or in the cab?
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Friday, July 3rd, 2020 AT 6:31 AM
Tiny
CHAD HINSON
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  • 6 POSTS
Well apparently, leaving the battery connected over night is the truck. The first night it stayed on. I disconnected the battery because I had to work the following morning. This morning I didn't have to work, so I left the battery connected all night. Upon checking this morning the light was off. I assumed the truck was dead, but it started right up. Parking light work fine, and the turn signal works fine. Light stays off now when the truck is off as well now. I'm sure it will be back so any other advice you have is very much appreciated. Thank you for the time and knowledge you have given thus far. Have a great holiday.
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Friday, July 3rd, 2020 AT 6:47 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

That's an interesting fix. LOL

If the light was staying on when the fuse I mentioned above was removed, then there is something shorting to power. The fuse above is under the hood.

If it happens again, what you will need to do is remove one fuse at a time and then replace it until you find one that turns off that light. Then we will know what circuit is causing the issue.

Let me know if it returns.

Joe
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Friday, July 3rd, 2020 AT 11:03 PM

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