[Healeys] BN2 overdrive driving me nuts

[Austin Healey]

Per,

Just a question: what happens if the throttle swiths is not working, and the
overdrive disengages while the propeller shaft if running at higher rpm than
the crankshaft?

Gergo

2011/9/4 Per Schoerner <healeyguy at bredband.net>

> Josi
> It seems to me that your cut out switch is incorrectly adjusted. The
> purpose of this switch is to keep the overdrive engaged when you flip the
> dashboard switch to the off position, provided the accelerator pedal is not
> used. Then when you accelerate the overdrive should disengage. This is to
> protect the overdrive from being disengaged while the wheels are driving the
> engine.
> The cut out switch is the thing with two wires attached that is operated by
> the throttle. To adjust it, slacken the screw that holds the lever to the
> axle. The axle has a cam that breaks the current when the throttle pedal is
> depressed. Adjust it accordingly, e.g. when the throttle pedal is depressed
> to about 20% the current should be cut off. Be careful, I have come across
> one cut out switch that was incorrectly adjusted and fried the wiring
> harness, so use an ohmmeter when you do this.
> It's your point 4 that triggered this conclusion. Not using the accelerator
> the overdrive should engage when the gear lever is in 3rd/4th and the
> dashboard switch is turned on, and stay there engaged when you turn the
> dashboard switch off.
>
> Per in Sweden
>
> Josi Vicente Vargas skrev 2011-09-04 05:01:
>
>> 1. mechanichaly it is fine. If I get under the car and pull the lever the
>> overdrive engages fine.
>>
>> 2. Do the cables (white with purple and white with
>> green) that go in the throtle switch have an specific order ?
>> Which one goes
>> on top and which one goes on bottom ?
>>
>> 3. If I do the test with a lamp as
>> described on the manual I get the exact opposite results of the manual...
>> when
>> the light shoul go off it tuns on and when it should be on it turns off.
>>
>> 4.
>> having the car on stands with the engine off if I engage 4th or 3 th gear,
>> when accelarate a little and I turn on the overdrive switch on the
>> dashboard I
>> can hear the solenoid engaging and I see the lever moving.
>>
>> 5. Same as point #
>> 4 but with the engine running and the damm overdrive will not work.
>>
>> 6. the
>> solenoid is new, the throtle switch is new, the relay is new.
>>
>> 7. Is there a
>> way to test the overdrive relay ?
>>
>> All ideas are welcomed including the ones
>> like insuring the car and burning it or throwing it down a cliff
>>
>> Thanks
>>
>> a
>> very dissapointed Jose ....
>>
>>
>>
>> Josi Vicente Vargas
>> Musmi
>>
>>
>> Tel. (571) 321
>> 3740
>> Cel. (57) 311 288 3401
>> Skype: jovivago
>>
>>
>> www.musme.net
>>
>>
>> Bogota,
>> Colombia
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