I did the relay upgrade about 7 years ago and upgraded to H5 bulbs and they are nice and bright now. I found a wire diagram and instructions on this web site somewhere. I have since found a guy who has the connector for the relay so you do not have to terminate directly to the relay makes it easy for relay replacement. two relays two bases with pigtail two headlight plugs with pigtails for $15.00.
I need to remove the old stuff and convert to the new system.

But it is well worth the conversion.