My A4 turn signal is not flashing even after the relay has been replaced

check the flasher relays in the fuse box. these are what causes the lights to flash.

check your relay for flasher

To me it sounds like you have a bulb about to burn out or already burnt out. check all of your bulbs and replace the one or ones that are bad.

You'll need to replace the turn signal multi-function switch. It is grounding the white feed wire from the flasher when it is not supposed to. This is a really common problem with these. I have heard of people cleaning the switches with electrical cleaner and having that work as well.

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If any turn signal doesn't flash that means you have a bad flash relay. It is not that hard to replace and should be in your fuse box underneath the hood. Go to your local automotive parts store and let them know you need a flash relay for your turn signal and they will know what you mean and they may even put it on for you since it doesn't take that long. Have a good day!

have you simply tried to replace the bulb?

The relay is dead. This is VERY common on these cars. It's built into the hazard switch. Get a new one (inexpensive even at a dealership, but cheaper still at www.ecstuning.com), and replace it and you'll be back in business.

You need a new flasher unit

HI, this is a defective flasher relay. you will need to replace this relay asap. this will fix your issue.

The flasher relay is located behind the lower left side dash panel/knee bar.

1. Remove the lower dash panel/knee bar to access the flasher relay.
2. Remove the relay from the electrical connector and replace as necessary.

Well it sounds like you have a short circuit somewhere. it apperars to be messing with the relay that you replaced. have you checked all the fuses in your fuse-box? how about all the bulbs on the exterior of the vehicle? try those things then post back.