With headlights on, the turn signal indicator and bulbs on left side illuminate but do not flash?

Tiny
EDDWARDJ
  • MEMBER
  • 1999 CHEVROLET CAMARO
  • 5.7L
  • V8
  • 2WD
  • MANUAL
  • 250,000 MILES
I replaced the left burned socket and spiced the 3 wires. Turn signal operates normally in the day. But, with headlights on, the turn signal indicator and bulbs on left side illuminate but do not flash. Right side operates normally. I replaced the flasher with a new solid state flasher relay with no change.
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Sunday, February 11th, 2024 AT 2:20 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,645 POSTS
Hi,

Either you have the brown and black wires mixed up (black ground / brown park lamp) or the daytime running lamp (DRL) module is faulty.

In theory, if the headlamps are turned on and you have power going to ground at that socket, it may be back-feeding through to the light and indicator. Check to make sure they are in the correct order.

Next, when the turn signal is turned on, there is a relay in the DRL that allows power to reach the signal. Once that switch is turned off, the relay should return to an open position which will allow the parking light to turn back on. (See pic below)

Check to make sure the wiring is correct, and you have a good ground.

Let me know what you find.

Take care,

Joe

See pic below.
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Sunday, February 11th, 2024 AT 4:58 PM
Tiny
EDDWARDJ
  • MEMBER
  • 4 POSTS
Thank you. I am going to support my local small business and bring my car and your note to my mechanic.
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Monday, February 12th, 2024 AT 8:17 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,645 POSTS
Hi,

Sounds like a plan. If you have a chance, could you let me know what they find? I'm interested in knowing.

Take care,

Joe
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Monday, February 12th, 2024 AT 3:26 PM
Tiny
EDDWARDJ
  • MEMBER
  • 4 POSTS
I have service appointment Wed 8am, will advise.
PS: my '99 has an LS6 under the hood.
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Tuesday, February 13th, 2024 AT 8:38 AM
Tiny
EDDWARDJ
  • MEMBER
  • 4 POSTS
Jose said one of the wires had a loose spice connection. He redid the splice and was done in 20 minutes, no charge. I promised to write a nice BBB and YELP review, but I will not mention "free".
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Wednesday, February 14th, 2024 AT 10:37 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 107,645 POSTS
Thank you for the update and I'm glad to know the problem was resolved. I suspect it was the ground wire that was allowing power to backflow to the indicator. Did he mention anything like that? And, like you, I feel recognition of a job well done is always a good thing.

Take care of yourself and feel free to come back anytime in the future.

Joe
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Wednesday, February 14th, 2024 AT 7:51 PM

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