I had the same problems with my 02. It was caused by the voltage drop to the pumps. The wire is way too small to pull all those amps. Dealer re-wired with relays and they always work. No flipping switches back and forth or lubing impellers. Just to prove the fix, try running a set of jumper cables straight from the battery to your center pump. With the high-guage wire, the pumps will never get stuck.
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