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I don’t think so, the motor is not working at all.Are you sure they're failing and not getting clogged up with junk from the reservoir or something?
Seems very unlikely to have that many failures.
How to check wires?If failed means, pump motor will no long work. Even when 12 volts applied directly to it. Check power (wires) coming to pump. Also make sure pump is getting fluid to it. and tubes clear down stream.