Hanging cable connector underneath the front end of the car

Welcome to 2CarPros.

When a signal bulb is bad or something is causing power not to complete the circuit, the signal will flash double time. That is so the driver knows a bulb is not working. Based on your description, I would say there is a good chance it is related to the signal. Is it possible for you to let me know the wires' colors that are hanging or even upload a picture of what you see?

I attached a picture from the wiring schematic. It shows the wire colors to the left front turn signal. Take a look at it and see if what is hanging has the same colors.

Let me know.

Joe

Welcome back:

It appears to be the signal wiring harness. I can see in the first pic that the bulb is broken, so that is why it is flashing so fast. It must have come loose from the light assembly.

Here are the directions for replacing the bulb. You will need to remove the headlight assembly. I will include those directions, too. It is really an easy one to do. Once the assembly is out, route the wiring the same as the other side and replace the bulb.

The attached pictures correlate with removal and replacement of the headlight assembly. The directions are for headlight bulb replacement, but it shows how to remove the assembly.
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1999 Buick Regal V6-3.8L VIN K
Park/Turn Signal Lamp Bulb Replacement
Vehicle Lighting and Horns Turn Signals Turn Signal Lamp Turn Signal Bulb Service and Repair Procedures Repair Instructions Park/Turn Signal Lamp Bulb Replacement
PARK/TURN SIGNAL LAMP BULB REPLACEMENT
REMOVAL PROCEDURE
1. Remove the appropriate headlamp assembly.
2. Remove the rubber access cover from behind the park/turn signal lamp bulb.
3. Rotate the park/turn signal lamp socket counterclockwise to release.
4. Remove the bulb from the socket.

INSTALLATION PROCEDURE
1. Install the bulb to the park/turn signal lamp socket.
2. Position the socket to the headlamp assembly, then rotate the socket clockwise to secure.
3. Install the rubber access cover to the headlamp assembly.
4. Install the headlamp assembly.

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Here are the directions for the headlight assembly. Again, these directions are for headlamp replacement, but it is the only thing I have that shows how to remove the assembly.

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1999 Buick Regal V6-3.8L VIN K
Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement
Vehicle Lighting and Horns Headlamp Service and Repair Procedures Headlamp Assembly or Headlamp Bulb and/or Cornering, Sidemarker, Park, Turn Signal Bulb Replacement
HEADLAMP ASSEMBLY OR HEADLAMP BULB AND/OR CORNERING, SIDEMARKER, PARK, TURN SIGNAL BULB REPLACEMENT
REMOVAL PROCEDURE

pic 1

1. Raise the hood.
2. Apply light pressure to the headlamp lens to hold the headlamp assembly in place while removing the retainers.
3. Lift up the headlamp assembly retainers to release, then remove the retainers.
4. Carefully remove the headlamp assembly mounting tabs from the slots in the upper fascia support and the fender reinforcement.

Pic 2

5. Disconnect the electrical connector from the headlamp assembly.
6. Remove the headlamp assembly.

INSTALLATION PROCEDURE

pic 3

1. Connect the electrical connector to the headlamp assembly.

Pic 4

2. Carefully position and install the headlamp assembly mounting tabs to the slots in the upper fascia support and the fender reinforcement.
3. Apply light pressure to the headlamp lens to hold the headlamp assembly in place while installing the retainers.
4. Align the headlamp assembly retainers over the headlamp assembly mounting tabs, then press the retainers down until fully seated.
Check to be sure that the headlamp assembly is securely retained.
5. Close the hood.
6. Check the headlamp aim, If a new headlamp assembly was installed, or if service or repairs in the front end area may have disturbed the headlamp mounting brackets. Refer to Headlamp Aiming.

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Let me know if that helps you or if you have other questions.

Take care,
Joe

Welcome back:

You are seeing the light socket that screws on the rear of the light housing. I believe this one takes a quarter turn to fasten and unfasten. If the bulb was replaced at one time, it may not have been secured. For some reason it came loose and dropped down.

Welcome back:

Please bear with me. That looks like the beige part is the light socket and at the end it looks like a broken bulb. Can you provide a picture from a different angle so I can see if from a different point of view? It looks like what I described, but now with you new question, I'm questioning myself. It could be an ambient air temp sensor or even a sensor for the airbag.

As far as why I believe it to be what I first mentioned is based on the turn signal going a different speed and not working. If it came disconnected, then the harness could have dropped down. I hope you understand.

Sorry, it's hard to tell from pictures sometimes.

I will watch for your reply.

Take care,
Joe

Welcome back:

Yes, that sounds correct. The one in the last picture you sent is the ambient air temperature sensor. Is it possible for you to get me a picture from a different angle so I can confirm or can you confirm that it is the same as the one in the last picture?

See picture 1. That is of the ambient air temperture sensor.

Joe

Welcome back:

I'm back to my original thought but with a twist. It is a light, a GE 880. Most likely a fog light. Does the vehicle have fog lights? The bulb is a fog light bulb. The glass is broken off it, but I'm certain that is what it is.

See the attached pictures. If you look at pics 1 and 2, you see the electrodes in the bulb that are partially left on yours. I circled them in the second picture. Picture 3 is the bulb in the package.

It was hard to tell in your original post, but I thought it was a bulb. That's why I needed pics from different angles to confirm. When you said there was a turn signal issue, then I suspected it was the signal bulb. Does that make sense? LOL Not being there makes it tricky, but I feel very confident that is what you have.

Let me know if the vehicle has fog lights.

I will watch for your reply.

Take care,
Joe

Welcome back:

Not a problem. I'm happy to help. Sorry it took a few tries. LOL

You take care and let us know if you every have questions in the future.

Joe

The light should only fit in one way and should be a quarter turn to tighten or loosen. Are you sure it is sitting flat in the light assembly? Also, if the new bulb has a rubber o-ring to keep water out, make sure the old o-ring from the old light isn't stuck on the assembly causing it not to seat.

As far as a fuse, it is in the under hood fuse box. Fuse 17 is for the fog lights. I attached a picture of it below.

Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this helps or if you have other questions.

Take care,
Joe