Current problems ?

Hi my horn and central locking aren't working guessing relays ?

Well I am assuming that you have done a few checks but yes it is a likely cause . The horn does go through the BCU and obviously the locking as well . You could test if the horn is getting power and also with the CL, does it work with the key in the lock .
I used Paul at Technozen to replace the relays on my TF earlier this year . He informed me that at some point in the past my BCU had two relays replaced, one being the horn .
John

Thanks horn works when alarm goes and central locking doesn't work with key either both worked before last winter layoff, fortunately horn sounded for last MOT ?

What year and which alarm system do you have?

The car is a 53 reg 160 with the round fob?

Well have had all the relays in the SCU replaced, the central locking is working but the horn still isn't so have checked and it looks like the rotary coupler probably a stupid question but £18.80 on the bay a lot more like £60 to £115 from rimmers where have people got there's from ?