yeah right at the base, the big spring which is butted up against the lock housing bearing. its fully compressed in the pic, its the ridged bit 
Awsome, looks like i'l havee to take more bits off to get to it then but deffo worth a look as I really would rather have the horn wired up properly since everything else is now. Thanks mate
You're the only person that has pointed this out, everywhere I look just mentions the earth at the rack end... It's good to learn something new!
