OK, it cooled down some so I went out to the garage for another look.
I unhooked the connector, but unfortunately the screw holding the ground strap to the body is hidden down behind my tripower manifold. As a result I wasn't able to get a decent grip on it with a screwdriver so I left it connected.
The top terminal still reads 14.7 ohms to ground (measured either from the case of the wiper motor or from the ground strap.)
The other two terminals are open circuits, with infinite resistance.
I then dug out two other wiper motors from a junk box and checked them. Both of them had a reading of about 20 ohms or so to the top terminal, with infiinite readings to the other two terminals. Now, I'm not sure exactly what cars these two are off of...they're both from Pontiacs but I don't remember what years. They look as though they have the same mounting bolt pattern but the electrical terminals are oriented differently - one has them sticking straight out and the other has them laid over flat to the wiper casting. These two both have washer pumps on them, which may be why they look different than the one in my car which doesn't have a windshield washer.
|