I have just finished rewiring my power windows with relays so that the electric motors are supplied with current from the battery and the original switches only act to trigger the relays. Was quite an effort to wire all four windows but the difference in speed going up and down was amazing. Previously, my windows were really slow going up and down. Now they work as good as the power windows on any modern car. Highly recommend this modification to anyone who suffers from slow power windows. As an added bonus your window switches will last longer without so much current going through them.