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Discussion Starter · #1 ·
Randomly my left blinker started fast blinking like it was indicating a bulb was out. I haven’t been able to figure out what the problem is. The parking lights work fine and the blinkers do work, they just blink fast. The right side blinks normally. I didn’t put LED’s in the car. The bulbs are just as bright as the right side so I think the amperage is okay. I checked both front and rear and replaced with new bulbs anyways. I swapped the relay in the trunk fuse panel with a known relay that works. I cleaned up the turn/parking light sockets. I tore the dash apart because I read that they often go through the hazard switch but I think they changed that at some point because mine doesn’t look like the ones that people are changing. I even unplugged the hazard switch and used my blinkers and the issue was still there. I changed the turn signal switch (steering wheel stalk) and same thing. I cleaned up the ground in the front harness. The rear one is in the trunk and looked perfect. I checked for power even tho the lights were still working. Had 12 volts with the car not running. I’m at a complete loss

if there is the old school relays on this car idk where they would be. Everyone keeps saying the hazard switch or a computer issue? That would suck. Any advice at this point would be appreciated. I have looked all over forums, google, Reddit, and YouTube and have not come up with any solutions

thank you
 

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2011 Malibu LTZ 3.6L V6 Red Jewel Tintcoat
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Let's start with turning on the parking lights and then testing the operation of the blinkers.

Does the left still blink fast?

Check both bulbs and see if the parking light is going out or if the turn signal is actually being lit. There are 2 filaments in those bulbs, so they share the same ground and should light up independently of each other. If the parking light goes out, then the issue is in that part of the system.
 

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Discussion Starter · #3 ·
Let's start with turning on the parking lights and then testing the operation of the blinkers.

Does the left still blink fast?

Check both bulbs and see if the parking light is going out or if the turn signal is actually being lit. There are 2 filaments in those bulbs, so they share the same ground and should light up independently of each other. If the parking light goes out, then the issue is in that part of the system.
the parking lights work and they are staying lit while the turn signal is blinking fast. Both front and rear parking lights are working properly and both are staying lit while the blinker is operating.
 

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For me its early..... so excuse me if you covered this in your post

Do your quick flashing dash indicator match turn signals? A diagram would be nice . To back trace circuit.
There are two relays for flaahing the bulbs, hazards...and signals. If hazards are blinking correctly..... its definately in the turn aignal circuot.....and not the bulbss. Only thing i think that is in the circuot..... is the switch....then relay....then bulb..... so IMO the turn signal flasher relay is on the way out.....or somthing is wrong there.
 

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70813

K, not 100 % if this is for your year.... it would seem its a little more complicated.... not sure why but the bcm can even be involved as you can see in the diagram.
 

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Discussion Starter · #6 ·
I was worried it can be a potential bcm issue. And he’s the hazards work properly. And the lights themselves do flash fast with the indicator on the dash. I’ve replaced the switch at the steering wheel with a brand new one and I swapped the relay that is for the parking lights (but they use the same lights, it’s the closest I could find) and still the same issue. I think the only thing I really haven’t done is check the wires from the turn signal harness to the bcm itself
 

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If I read that diagram right, the Hazard switch also has a relay inside it. When the key is in RUN or START, the coil is energized and 12V is provided to the BCM on the purple wire.

When the turn signal is moved to Left or Right, a load is placed on that side and the BCM expects it to be within a certain amperage range. If it's too low or too high, it will hyperflash.

It seems that the Hazard switch is doing its thing.

To test the BCM wire, find connector # C2 (which may be labeled J2 or X2 on the case), then find terminal A8. It should be a purple wire. Test it for 12V when the key is in RUN or START. It should not have power when the Hazard switch has been activated and the turn signal is in the middle position (off).
 

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Also on another note. Cars used to always have 2 relays.....or flashers as they were called.....one for hazards and one for signals....they were independant of one another.

But what males the lights quickly blink when one signal has failed normally. I see multiple relays involved ....now if one bulb is burnt out..... does one of these relays trip..... twlling the lights that aren't burnt out .....to blink quicker.... Thats why i think there is a ti,er in the hazard relay (top right). Soooooo i think possibly, there is a relay on the turn signal circuit that is faulty..... and has tripped a second circuot...... making the sped up turn signals..... via the timer in the hazard relay ...

Just a guess though, but withought seeing another flasher just for the turn signals ( according to diagram they are both incorporated into one)...i lean this way. That component has gone bad some how internally.... i dont think its just a simple flasher like in the old days..... Unfortunately i am not sure where its located
 
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