No wipers no horn no indicators

Fuse #40 on one model.. Look here for your year:

https://www.google.com/search?q=VW+polo&ie=utf-8&oe=utf-8#q=vw+polo+fuse+box+layout

Horn relay could be bad too.

check your fuse first. if fuse is fine then is probably the horn relay

Check the top right hand mini blade fuse 7.5A .My washers stopped even though the wipers were ok.Mechanic at my local garage told me about the fuse.

hi
each fuse located in the vehicle has a color and according the color you can define the rating amps
and there is number written in the fuse it self
Color Ampere DarkBlue 0.5 Black 1 Gray 2 Violet 3 Pink 4 Tan 5 Brown 7.5 Red 10 Blue 15 Yellow 20 Clear 25 Green 30

2003 vw polo my wipers run all the time even when i turn off the ignition and take out the key have to remove fuse to stop.

Sometimes when the spark plug cables are dying (or are from a lousy manufacturer) it affects the dashboard. Happened to me when i had a 97 Polo, check that, it could be the same problem.

Look into changing the ignition switch...sounds odd I know, but we had similar issue and that was the problem.
Good luck!

if you hear noise check the nut that holds on wiper arm.if no noise check for voltage at wiper motor,if no voltage check fuse

their is a secondary fuse for the horn/ hazard like circuit in the engine bay, front left hand side. i think from memory it is a 20amp blade fuse

when you take the steering wheel off the is a abs sensor ring (round) if this is damaged the horn will not work cheers

1 take air bag out
2 take bolt of for the steering wheel
3the sensor will be underneath the steering so pull off that aswel as the steering wheel
4replace the rounds plastic ring(the horn also conects to it
cheers