The heater motor in the Austin Healey is a DC electric motor , the field
windings are parallel to the armature , to reverse the rotation of this motor
you would have to change the flow of electricity through the field widings OR
through the armature ... when you change your battery to negative ground you
are reversing the flow of electricity through the field windings AND the
armature , the motor will still run in the same direction as before ...
The radiator fan motors on a MGB have permanent magnets , so if you
connect the motor backwards you have reversed the flow of electricity ONLY
the armature ... ie . motor runs backwards , engine will overheat ...
Gary A, can you use this
British Car Specialists 2060 N Wilson Way , Stockton , CA 95205
(209)948-8767 FAX # (209) 948 - 1030
AUSTIN HEALEY TECH TALK by Norman Nock
2005 updated issue has 243 pages
l have been writing technical articles for the Healey clubs for over 20
years. After numerous requests l have gathered them together along with some
before published articles and had them spiral bound in book form.
Send $35.00 plus $ 4.00 shipping ( U.S.Funds )
British Car Specialists .. 2060 N Wilson Way ... Stockton .CA 95205