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Where is turn signal relay signal and emergency flasher?

Tiny
DARYLKGIBSON
  • MEMBER
  • 2006 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 141,000 MILES
Left turn signal light bulb comes on but wont flash, left emergency flasher light wont flash, left turn signal switch inside car light flashes fast. Replaced bulbs and fuse but lights on left side still wont flash. I think it is the turn signal relay, but I can't locate it or find a diagram of it on line. I don't know where it is located at to replace relay.
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Sunday, April 28th, 2019 AT 4:45 PM

21 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This could be a problem with your Body Control Module (BCM), which is located by the steering wheel column. It controls many functions, but the hazard/turn signal operation is one of them. It accomplishes this by supplying battery voltage to the bulbs at regular intervals when the flasher or turn signal switch is applied. In the diagrams down below I have included diagrams and descriptions for the BCM, Instrument Panel Fuse Block (which includes the flasher relay), and the Turn Signal/Flasher operation, as well as a complete set of the exterior lighting descriptions. Please get back to us with what you are able to find out. Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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Sunday, April 28th, 2019 AT 9:49 PM
Tiny
MADDIEANDKENNY SCHENEMAN
  • MEMBER
  • 1 POST
  • 2005 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 177,000 MILES
I can't find where the flasher relay is located to replace it.
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

There is no flasher for this as in the older cars. The newer cars, the flasher is the body control module.

This guide can help

https://www.2carpros.com/articles/turn-signals-not-working-blinker

The turn signal flasher function is performed by the Body Control Module (BCM).

What is your exact issue?

Roy
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
USMCJOSH24
  • MEMBER
  • 1 POST
  • 2005 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 89,000 MILES
Here's the problem, I have a 2005 grand prix and it is driving me insane. The problems is with the electrical in the lights. Blinkers and out. They are the front passenger and the rear driver side blinkers. The other two work. The real brake light doesnt work. The The two blinkers that dont work are on all the time they just dont blink. Even when the turn signal is off. I dont know what to do
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
First check your ground as it sounds like that may be your problem, not grounding. It is usually a black wire. It may be under the rear window so you may have to remove some panels to find it. See if it'sloose. It can also be a socket that is causing this that the lights go into.
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
KINGWINGO
  • MEMBER
  • 1 POST
  • 2004 PONTIAC GRAND PRIX
  • 175,000 MILES
Both of my rear turn signals go out at the same time and I have to beat on my dashboard for them to come back on.
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It may be the hazard switch is bad and by bating on dash it jars the module to work. Have a mechanic scan for codes and see if a module is bad on this causing it.
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
JUNE_2208
  • MEMBER
  • 1 POST
  • 2004 PONTIAC GRAND PRIX
Electrical problem
2004 Pontiac Grand Prix Engine Size unknown Front Wheel Drive 61000 miles

the rear driver side blinker does not blink but the light is constantly on
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
SPADE007
  • MEMBER
  • 37 POSTS
Did you try changing light bulb? Check the flasher too.
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
JHANCOCK1
  • MEMBER
  • 1 POST
  • 2004 PONTIAC GRAND PRIX
  • 234 MILES
Hi, a day ago I got in my car to go to work.I noticed on the DIC it flashed up charging system failure. It would go off then come back on all the way to work. Took the car to Advance and they said that the batry was ok. The alterator had the word "ripple" in the read out. Drove it home went to work the next day. Same thing. However driving home this time my DIC read theft bla bla bla, then brakes needs repairing. ABS came on in dash. I had no radio face read out. My turn signal turned off my speed odometer. Then my car windows wouldn't go up only until I switched the car all the way off, then they went up. Then I noticed my door locks were still locked hit the unlock button and they unlocked. Crazy ride home! I looked at the battery. The positive cable was not tight so I tightened it real tight. Tried the car again. Theft warning still displayed on dash. Wonder if there is still a problem?
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, this time it to a shop not a salesman. It sounds like your alternator has failed. Have both the battery and the alternator checked

Roy
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Tuesday, July 21st, 2020 AT 1:44 PM (Merged)
Tiny
PONTIAC2003
  • MEMBER
  • 1 POST
  • 2003 PONTIAC GRAND PRIX
  • 6 CYL
I having a problem finding the location for turn signal flashers on 2003 pontiac grand prix
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Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Left side dash. Here is a the diagram below so you can see how the job is done. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers
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-1
Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
OBDALECCIO
  • MEMBER
  • 1 POST
  • 2002 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 85,000 MILES
The turn signals and hazards stopped working on my grand prix, so I checked the fuses and they were blown. I've replaced the fuses but it seems to only fix the problem for a short time before the fuses blow again, they dont blow at the same time the hazards only blow when I use them. I've checeked all the bulb's and for any loose wires maybe shorting out to ground but havent seen anything wrong yet. Shortly after this problem started my brake light stopped working, except for the middle one. All the bulbs are fine and no fuses are blown. I dont know if these two problem are related. I also have a remote starter on my car could that be causing the problem?
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Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Maybe a problem with the flasher, I can't tell for sure.

The lower brake lites and turn signals are wired through the multifunction switch, use the same bulb filament, not at the same time. The high-mount brake lite is wired differently.
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Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
LOGHOUSE
  • MEMBER
  • 1 POST
  • 2001 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 90,000 MILES
I had a garage check my car due to tail lights not working. They told me it was the Multi Function Switch. I looked that up on internet (a blog site) and saw where it could be a short and to wiggle the hazard button. I did and the tail lights worked. Now when I put the car in gear (drive) the ABS, SBS, Tracking and lights all go off for a time and then click back on. My husband does not think it is the Multi Function Switch. What could be the problem?
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Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
FAER816
  • MEMBER
  • 2 POSTS
I've got the same problem and have been told it's the same thing. I too played with my hazard switch and when my right blinker would stick I had brake lights. I've ridden that wave for as long as possible and now nothing works. I found a switch lever on Ebay for much cheaper than the $275 that most places are asking for it.
Haven't had the chance to put it in yet but while looking around found a forum that said there's a switch on/around the brake pedal that can be adjusted.
Good luck!
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Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
MRED
  • MEMBER
  • 1 POST
  • 2001 PONTIAC GRAND PRIX
  • V8
  • FWD
  • AUTOMATIC
  • 100,000 MILES
2001 Grand Prix, when using the right turn signal it sounds like it's galloping/ticking at a high rate. The front right turn signal light works, but the rear right does not. Help! We have had this car into the shop alot since we turned 100,000 miles. This car is sucking me dry. Thank you for your time.

Mr. Ed
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Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
STEVE MOOREFIELD
  • MEMBER
  • 1 POST
REPLACE RT. REAR TURN BULB
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Tuesday, July 21st, 2020 AT 1:45 PM (Merged)
Tiny
BWILMOTH
  • MEMBER
  • 2 POSTS
  • 2000 PONTIAC GRAND PRIX
  • 120 MILES
Have upper brake light (window) but do not have back brake lights or turn signals. Have changed the bulbs, sockets and fuses. Any ideas?
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Tuesday, July 21st, 2020 AT 1:46 PM (Merged)

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