The unit on top is actaully an interlock switch. It opens/closes as you throw
the
shift lever over to the 3rd/4th side of the shift pattern. This forces the O/D
to
drop out in 1st/2nd gears as the torque/drive can wreck the o/d in the lower
and
reverse gears.
The lower soleniod (on the side of the tranny at the bottom as such) is the
main
control. 'Switched' V+(on only when ignition is on) goes to the interlock
switch on
top. The output goes from that switch to the gear shift lever mounted switch.
then
from the knob switch to the lower soleniod. The second terminal of the
solenoid is
grounded to the nearest o/d case bolt via short wire.
There should be a harness hanging down next to the bellhousing near your
mechanical
fuel pump, with at least two (if not three) wires.
1) V+ that feeds the top mounted o/d switch as well as being the V+ supply to
your
reverse light switch (mounted on the the top left side of the shifter pivot
box)
2) the return line from your reverse light switch that comes back up from the
tranny and goes to the rear of the car for the reverse lights.
Paul Tegler
ptegler@cablespeed.com
www.teglerizer.com
On Wed Nov 28 9:26 , "Stasyszen, Jerry" sent:
>Hello all, I have a J Type overdrive I am going to install in my 76 Spitfire.
>It has a wiring harness attached to it but none of the wires are hooked up.
>There are two solenoids on the transmission, one below the gear shifter that
>is a three inch cylindrical solenoid with two male wire poles that are not
>marked another smaller pancake looking solenoid on top of the transmission
>that also has two male wiring poles that are not marked. Can anyone tell me
>which wires go where, I am not even sure if the wiring harness is the correct
>one. The overdrive is from a 77 spit with UK markings FRXXXXX.
>
>Thanks
>Jerry
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