Ignition switch contacts were pitted. 243000 miles of starting showed it life span of electrical demise. The other problem was the relays needed a heavier wire from the power to the contacts. Manufacturer use the thin circuit board to transfer the power.I just stripped some twisted cooper wire and soldered it from the power input to the contact side of the relay. Manufacturers use a thin strip of solder instead of a wire which inturn acted like a fuse and blew. I chased a whole lot of electrical gremils to figure this one out. Replacing the high mileage ignition switch is something I would higly address in everyones High mileage volvo. Now since replacing my ignition switch, everything gets the 12 volts it needs. My 745t has never preformed this well. I did open up the old switch and found pitfed contacts and blackened areas where they were arcing.