Hi, Simon -
The following describes the BJ8 wire colors. I'm not sure if they are the
same for the BT7, but.....
If you pull off the connector with the two white/purple wires from terminal
W2 of the overdrive relay,
then pull off the connector with the two white/green wires from terminal C2
of the overdrive relay,
then connect these two sets of wires together
you will have disabled the overdrive relay and bypassed the throttle switch,
but you will have power available to the overdrive solenoid.
The solenoid will be powered only when the gearshift is in 3rd or 4th as
normal, but if you turn off the dash switch the overdrive will disengage
immediately. This is not good unless you do it while accelerating slightly.
The overdrive will be disengaged via the gearshift switch when you put the
car in reverse, however just to be safe I would make sure the dash switch is
off before reversing.
Have some good Healey fun in Ireland!
Steve Byers
HBJ8L/36666
BJ8 Registry
Havelock, NC USA
-----Original Message-----
From: owner-healeys@autox.team.net
[mailto:owner-healeys@autox.team.net]On Behalf Of Simon Lachlan
Sent: Thursday, May 25, 2006 11:11 AM
To: 'Healeys@Autox. Team. Net'
Subject: By-pass the overdrive relay?
Hi,
Whilst cramming the huge new 6 branch exhaust into the miniscule space that
is the engine bay of my MkII BT7, I touched the terminals of the OD relay on
the bulkhead with the end of a socket spanner extension. (I have the relay
with spade connectors).
Luckily I've fused it, but that did not prevent the customary blue flash and
smell of fried Lucas.
So, when I took the car out for a test this afternoon, the OD engaged once
then out again with fuse blown.
Engine off so I could experiment with new fuse etc and hear the click and
new fuse in holder..relay on bulkhead made god-awful buzzing then fuse blew.
I have no time to be too thorough as am taking car on trip to and round
Ireland in two days time, so I've ordered new relay and hope my diagnosis is
correct (fried relay).
BUT, the supplier may let me down or I may be wrong...
Please remind me:-
Am I right in remembering that one can by-pass the relay so that it just
comes on with the switch, but has nothing to do with the revs/position of
the accelerator??
Am I also right in remembering that this does not jeopardize the OD as the
switch by the gear stick continues to function and the OD still disengages
when one puts car in reverse??
I used to be quite au fait with OD electrics, but - like a student who crams
for his exam at the last moment - I've forgotten it as quickly as I
learnt(?) it.
My ferry to Ireland leaves at 02:45 Sunday morning. What a time!
Simon Lachlan
Comfort House
Bradninch
Devon EX5 4NN
UK
MkII BT7.
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