Carl,B
I helped Dan write his section on the 2-speed wipers in his electrical
manual.B I had a TR4A 2-speed motor out on my desk at the time.B I did not
dismantle it.B I found that the "low" speed was obtained by grounding BOTH of
the switched wires.B It made no sense to me.B A few hypotheses were made
about why this may be true, but that seems to be the way it works.B I have
been tempted over the tears to pursue this further, but I never bothered.B To
me they are literally a black box, but I woud be interested to see how they
really work!B Keep me in the loop too!
-Tony
----- Original Message -----
Message: 5
Date: Mon, 28 Sep 2009 09:43:18 -0700
From: carlsereda < carlsereda@aol.com >
Subject: [TR] 2-speed wiper wiring diagram
To: fogbro1@comcast.net , triumphs@autox.team.net
Message-ID: < 96887ACA.33C2.4FD8.A80E.7B0656B0D319@aol.com >
Content-Type: text/plain; charset="us-ascii"
Hi Ed,
If you have any luck finding specs can you keep me in the loop?
I believe the way 2-speed wiper motor works is when you turn on the second
click of the 2 -position switch, a secondary winding on the field coil (simply
about 50 rounds of extra wiring over the standard field coil) is activated,
giving faster armature action. Otherwise I think all else is same as a
standard 1-speed unit.
Regards,
Carl
'63 TR4 since '74
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