[Mk2] [Turbo] Failed MOT on Horn :(

[TubbyTwo]

Hi guys, my tubby has just failed its MOT as the horn doesnt work.

They have tested the horn itself and thats fine, but when its on the car it doenst work.

I can hear the relay clicking but no horn

is there any way the relay might need replacing?

anything i can try?

thanks

[Steve-O 2007]

I was getting this as well on my Aftermarket Arena horn and for me it was a dodgy wire. Replaced it and works fine now.

[Frustrated Pilot]

Where was the dodgy wire?

[Steve-O 2007]

Wow, this post is nearly a year old

Anyway, I just disconnected all the wires from the Arena horn control unit, noticed one wire looked dodgy and one wire had about 1 meter worth wrapped up so cut the long one down and re wired the dodgy one.

Oh and I noticed the earth wire where it was bolted to the chassis was a rubbish earth point so bolted the earth wire direct to the battery so check your earth wire as well

[TubbyTwo]

mine was because after fitting my pre rad for the chargecooler i forgot to plug the horn back in

[Moo]

I guess that's why you never posted back at the time with the fix

[Frustrated Pilot]

sigh..

how do i take the bumper off?? all the bolts have sheared...

bearing in mind i need this car for work the job needs to be complete in 5 hours!!! How long does it take to sort out?

I think im best getting new horns... just in case?

[toxo]

There's a guide at http://osmanu.com/mr2/bumperremoval/index.html

You can use the horns off anything, just nip down a scrappy. I see no discernable difference between the horns on my car and the horn on my old fiesta. You just give them +12v and they make noise.

I would say you could get it all done in 5hrs on your first go It's not very difficult.

[Steve-O 2007]

I would say you could get it all done in 5hrs on your first go It's not very difficult.

Maybe but he says all his bolts have sheared on the bumper which might be a bit of a pain

[toxo]

ISTR they all screw *into* the bumper, so if they've sheared it'll just fall off, no?

[Frustrated Pilot]

nope stuck fast

So I give up for now.. and hopefully it doesnt come off whilst driving :S

Will need to look into drilling and tapping new bolts.... but simply no time right now