Put the +12 v wire to one side and ground the other. If it switches it is ok. If you find it ok then you will need to "rod" out your egr tube from the valve to the intake manifold. It is going to be plugged at the manifold end. Try to run an old speedo cable down through it while turning the cable with a drill motor. It is kinda a pia type of job but is doable by a diyer. I've had to rod mine out a couple times.

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Jim