Mod Description
Some dick head cuts you up, you go to show your displeasure with a sound of the horn and it doesn't workMod Details
PremiumYes Difficulty![](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/menu-normal-over.png)
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![450 Fortwo 450 Fortwo](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/model5.png)
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![454 Forfour 454 Forfour](https://www.evilution.co.uk/wp-content/themes/evilution/images/evilution/model9.png)
Important: To test the horn, the ignition must be in position 1.
Firstly, do you know what smart you own? Check here. A non working horn is usually very easy to sort.
Follow these in the order shown until it works.
Fuse
600cc 450 with ZEE unit fuse box – Fuse 16
700cc 450 with SAM unit fuse box – Fuse 31
800cc diesel 450 with ZEE unit fuse box – Fuse 16
800cc diesel 450 with SAM unit fuse box – Fuse 31
999cc 451 with SAM unit fuse box – Fuse 31
800cc 451 with SAM unit fuse box – Fuse 31
Roadster with SAM unit fuse box – Fuse 31
Forfour all variants – Fuse 10
Pull the fuse out and visually check it, if you have a new replacement, fit it anyway.
Check The Steering Wheel Horn Switches
The steering wheel has 3 contacts underneath the part you press to sound the horn. Try pressing all over the horn press to make sure it’s not a poor contact. There are 3 points for the horn so if 1 works but the others don’t, take the wheel apart and give the other points a clean.