Sounds like a short in the motor or possibly a short in the wiring. Any
auto electrical shop can test it for you or you could do it yourself. A
quick test would be to run a wire to the battery and a ground wire to
the motor. If it works then you know the problem is not in the wiper
motor.
...Art
On Mon, 22 Dec 1997, Tom Buchanan wrote:
> A month or so ago I asked the list about the problems with the windshield
> wipers on my 74 MGB-GT. Well, I finally got around to taking on the repair.
> The problem was that the wipers were VERY slow and if allowed to continue
> running would eventually stop and wouldn't work again until the next day.
> Well, last night I removed the entire wiper system, motor, gearbox and
> linkage. I recall that some listers couldn't figure out how this is done.
> Some even thought that the dash would have to come out. It doesn't. To take
> everything out do the following. Remove the glove box (so you can see what
> you are doing) then remove the wiper blades and arms. Then remove the nuts
> right under the wiper arms. Then go back in side behind the removed glove
> box and remove the two bolts that secure the wiper motor to the firewall.
> The entire assembly (including linkage) will come right out the passenger
> door.
> Before hand, on the advice of a Triumph fanatic, I purchased a set of
> brushes for the motor from Vicky B's. I took the gear box apart and
> everything looked fine. I took the motor apart and the brushes looked fine
> also. (I'll replace them anyway) The only thing that was suspicious was
> that the motor smelled as if it had been hot. (the motor does work though).
> The only other thing I noticed was that everything was greased well but it
> seemed that the grease was stiff. I don't know how thick the grease is
> supposed to be though.
> Anyway, can anyone figure out what the problem might be?
>
> Tom Buchanan
> buchanan@preferred.com
> http://pages.preferred.com/~buchanan/mg.html
> 1974 MGB-GT
> Kingsport, TN
>
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