running tail light does not work

2001 CHEVROLET TAHOE
175,000 MILES • 4WD • AUTOMATIC
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GIL123
  • MEMBER
  • 6 POSTS
My passenger rear running tail light won't go on but when I press the brakes it lights up only won't go on at night when I need them to what could it be
May 14, 2015 at 3:08 AM
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JOHNNYT73
  • ✓Experienced Mechanic
  • 924 POSTS
Is it just one side that does not light up? Have you tried replacing the bulb? the bulbs should be double filament bulbs that are with running lights and brake lights.
May 14, 2015 at 3:49 AM
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GIL123
  • MEMBER
  • 6 POSTS
Yes it only the passenger rear side tail light when I press the brake it lights up but the running light does not work change the bulb already still won't light up
May 14, 2015 at 4:50 AM
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JOHNNYT73
  • ✓Experienced Mechanic
  • 924 POSTS
Ok, you need to just replace the circuit board that all three bulbs plug into.
May 14, 2015 at 4:56 AM
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GIL123
  • MEMBER
  • 6 POSTS
By chance were would I find the circuit board ?
May 14, 2015 at 5:13 AM
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JOHNNYT73
  • ✓Experienced Mechanic
  • 924 POSTS
Attached to the back of the tail light. Attached a photo.
Image (Click to enlarge)
Attached Media
May 14, 2015 at 5:19 AM
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GIL123
  • MEMBER
  • 6 POSTS
My truck has individual ones
May 14, 2015 at 5:29 AM
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JOHNNYT73
  • ✓Experienced Mechanic
  • 924 POSTS
ok, look inside the connector where the bulb goes into. Does it look burned or melted? What is the bulb number you have in there now to replace the old one?
May 14, 2015 at 5:36 AM
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GIL123
  • MEMBER
  • 6 POSTS
The bulb is 3157 longlife bulb
May 14, 2015 at 5:44 AM
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