Left turn signal is blinking fast,where is the relay located at?

You make it sound like it's our fault you can't find it :>D

The start of production of the Audi A4 B5 is 1994. With minor changes, it was produced until 2001. At first, only the sedan version was available, the station wagon (Avant) appeared a year later. This material provides information on relay circuits and fuses Audi A4 b5 1994, 1995, 1996, 1997, 1998, 1999, 2000, with an assignment of their elements and locations.

Can't get much clearer than this. Relay 4 is one plus 'Additional Relays 23 and 24. Plus fuse 23 and 24.

Fuse box diagram Audi A4 B5 and relay with assignment ...

https://fuseandrelay.com > audi > a4-b5

This material provides information on relay circuits and fuses Audi A4 b5 1994, 1995, 1996, 1997, 1998, 1999, 2000, with an assignment of their elements and ...
‎Passenger compartment · ‎Main fuse box · ‎Relay box · ‎Engine compartment

Sir,

The combination flasher unit for the turn signals and hazard flashers is located to the left of the floor console behind the lower steering colum trim cover.

Thanks
good luck

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sounds like it may be the flasher relay location as indicated in below.

https://www.google.co.uk/search?q=2007+Hyundai+Santa+Fe+indicator+relay+position&rlz=1C1ASUM_enGB638GB638&tbm=isch&imgil=brHkRdpGAOlRWM%253A%253BVM-Azms89RJLLM%253Bhttp%25253A%25252F%25252Fwww.justanswer.com%25252Fcar%25252F26vlf-2007-hyundai-santa-fe-where-turn-signal-flasher-relay.html&source=iu&pf=m&fir=brHkRdpGAOlRWM%253A%252CVM-Azms89RJLLM%252C_&usg=__6s-LvGJmdahb4w6Bj4_Jm2dEnqQ%3D&biw=1344&bih=684&ved=0ahUKEwjMqte30erTAhWMIcAKHcWRD5EQyjcIOQ&ei=H9AVWYyfI4zDgAbFo76ICQ#imgdii=jXmYJfKIUou0XM:&imgrc=brHkRdpGAOlRWM:

The bulb? did you check both left side or just one?

have you simply tried to replace the bulb?

For Audi A4 the fuse box is located on the left side of dashboard behind a plastic cover (for left hand steering wheel vehicle). On inner face of the plastic cover you will find the fuse diagram.
First fuse on first row from left upper corner is Fuse Nr.20 = F20 (15A) - RH headlamp low beam, headlamp adjustment.
First fuse on second row from left upper corner is Fuse Nr.21 = F21 (15A) - LH headlamp low beam, headlamp adjustment.

reley eithor under dash witch is most likely
but on rare ocation it is under the hood in fuse panel

turn on emerg flashers and folow sounds likely the other reley not far

well, its not shifting into gear, mechanically or electronicaly, but by the blinking on your dashboard i would think your mechanic is right

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.

Check all your turn signal bulbs on the car's left side