green Cipher gets a new gearbox and
gets back it's reversing lights.
Having changed the gearbox to the
later style Reliant one which has reverse positioned
as lift, right and down, I realised that I could also
reconnect the reversing lights up as the new gearbox had
provison to add a reversing light switch. The
Cipher originally used a LHD spec Reliant gearbox that
had a reversing light switch in it. This feature
had disappeared long ago as when I purchased the car it
had a standard Reliant old spec RHD gearbox with no
provision for a reversing light switch..
used a standard Lucas switch part no SMB420/39184 it's
original fitment on series 3 Land Rovers and is 3/8" x
24 UNF thread, normally open and push to make switch.
The switch in this form
is too short to contact the reverse gear
selector shaft, so I've made an extension piece
from 8mm diameter Nylon 66 rod. This is a
similar approach to Reliants design I believe.
The Nylon rod is 25mm long with one end rounded
to contact with the selector shaft and the other
end with a 3mm hole drilled in to it about 2mm
deep just to provide a centre for the switch
pin. In hindsight this last step is probably not
the switch in place and adjusted, in neutral I
get an open circuit, which is good so far.
and with it in
reverse I get a closed circuit, so
electrically it appears to work OK.
So success so far, I'll have to wait to
see how well it works once it's
installed in the car and for how long.
The switch I think should be fine, but
I'm not sure how long the nylon rod will
last sliding against the 3/8 unf thread.