Hi,
There isn't an independent fuse or relay for the signals. Each light is controlled by the body control module located on the passenger side interior kick panel.
I attached a pic below showing the power supply. I have a question. Does the vehicle have factory LED lamps or are they a traditional incandescent lamp? I ask because if it has LED, the brake lamp shouldn't work. If it is non-LED lamps, the signal is separate.
Let me know that. Also, let me know if you checked for power at the tail lamp socket. Also, let me know if you have replaced all affected bulbs. The fast flash you see is an indicator that there is a bulb not working.
Take care,
Joe
See pic below.
Image (Click to make bigger)
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Thursday, May 4th, 2023 AT 8:11 PM