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I took another look at the leads that I'd used to test the SAI pump--the 7.5amp fuse had blown. I replaced the fuse with a piece of 20ga wire and the pump spun right up.
Last night after I thought the pump was dead, I tore it apart to determine the cause of death. I put it back together this morning after discovering the blown fuse, so that I could test it. It sounds okay, no screeching, but I'm going to go ahead and order new bearings since these are 20 years old with 80,000 miles on them.
I'm also debating replacing some other SAI parts, anything less than $50, since I already have everything torn apart.
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