[TR] Strange TR3 OD issue

Alexander Delis ols at bcdef.net
Mon Jul 14 18:25:52 MDT 2014

Found the problem

It was the relay.

Don't know why OD 2nd worked perfectly and 3/4 did not- can only assume the
3/4 ciruit was drawing more current but have no idea why

Works fine with the new relay

Thanks for all of the suggestions


On Jul 11, 2014, at 8:53 pm, Randall <tr3driver at ca.rr.com> wrote:

>> The only thing I can think of that is common to third and fourth is that
>> use the same lockout switch, but I don't know why it would pop out at a
>> particular RPM EVERY time.
> Vibration sensitive?
> Probably my first step would be to connect a voltmeter/DMM to the OD relay,
and take a test ride.  If it shows that the relay drops out when the OD does,
you know it's an electrical issue.  Then change the connection so you can see
the lockout switch at work.  Again, if it drops out when the OD does, you've
found your culprit.
> Might not be the switch, but the wires/connections to it.  One of the Stags
would drop out for no apparent reason (although it was much more random) and
it turned out that the quick connect to the solenoid was very slightly loose.
Not loose enough to fall off, but loose enough to sometimes lose contact.  So,
if the above test does show the relay is not being grounded through the
lockout switch, the next test might be to remove the tunnel and repeat the
experiment with the meter connected directly to the terminals on the switch.
> Randall

1958 TR3 TS33884LO
1968 GT6 KC10303

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