October 6, 2021 at 2:27 pm #4233
can someone please tell me how to get at the trafficator /horn switch. I’ve tried undoing the grub screws but it still does not want to come off. If I try to lever it any more I’m sure I’ll break the whole thing!October 7, 2021 at 10:31 am #4235MikeNParticipant
The trafficator switch has a long tube that goes all the way down the centre of the hollow steering column. The wiring goes down this tube.
Lay on your back at the front of the car and you will see a brass nut with the wires coming through. Undo this nut and it should all come free.
MikeOctober 7, 2021 at 1:32 pm #4237PeteJSKeymaster
As stated above, you’l need to undo the nut at the end of the steering box. You will also have to cut through the ‘olive’ that sits behind the nut in order to withdraw the centre of the wheel complete with the stator tube.
You’ll need to find a replacement olive – try plumber’s merchants – as the olive is there to keep the oil in the steering box.October 7, 2021 at 10:06 pm #4241
It will depend on which car you have.
If you have and A40 Devon or an A16 or A70 Hereford then you will need to cut through the Olive as the switch is fixes tot he long stator tube running through he column. The olives are very hard to find (I doubt you will get one from a Plumbing merchant unless they are a very old established shop.)
Fortunately the club has a good stock = speak to Ray.
If you have an A40 Somerset or Hereford or any Atlantic then you do not need to cut the Olive as these models have a split stator tube. On these models simply undo the grub screws and disconnect the wires at the bottom of the column and the horn and Trafficator switch will withdraw if there is enough slack in the cable.October 8, 2021 at 10:49 am #4243
Many thanks folks, just got to work out now why the indicators don’t cancel. I hate it when things don’t work.October 8, 2021 at 10:54 am #4245david1945Participant
I would like to know how to fix the self cancelling too, my indicators work o.k but do not self cancel so i wired in warning buzzers-easy job.October 8, 2021 at 6:13 pm #4247
The Indicators cancel via 2 cams on the switch. As the wheel is turned the cams move over a post which is bolted to the steering column nut once the wheel returns to straight ahead the cam pushes the switch back to off.October 9, 2021 at 12:55 pm #4249
Managed to dismantle everything, the ring with the raised “hump” on it had been put on 180. Degrees out! I now have self cancelling indicators. My next problem is that the three grub screws are so badly damaged I can’t screw them in far enough to hold the retaining ring in place. Does anyone know what thread they are, or even better has anyone got any good ones?October 9, 2021 at 2:03 pm #4251
Pretty sure they are 2BA grub screws. Available on eBay. Just search.
You will need to file/grind a point on them. so purchase them longer than you need.October 9, 2021 at 2:32 pm #4253
Many thanks for all the information, everything now back together and working! So pleased, but what a complicated/strange setup.October 9, 2021 at 5:39 pm #4255
I agree but it was standard Lucas system for most cars of the period. Just a different horn boss and switch. They often don’t cancel. My Atlantic is hit and miss.
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