Glen, You wrote He took the ignition switch out of the system, and it runs fine, each mag quits when you ground it. Then he checked the ignition switch (the new one) and it is OK. He checked the wires, and they are correct, right is right, left is left and ground is ground. If he actually checked all of the above as described, and if he proved that "each mag quits when you ground it" by grounding the ends of the wires that he removed from the mag switch (and he didn't do this test by grounding the wires at the magneto end of the circuit) then the most probable explanation is that the wires were connected to the new mag switch incorrectly. If he's convinced that everything is connected as it is supposed to be, and if the switch checks ok with an ohm meter, then you have to start looking for weird stuff like the conductor of a wire being broken inside a crimp on a terminal lug. I've seen this happen before. The lug looks good, the wire going into the lug looks good, but there is no electrical connection between the wire and the lug. I've even seen a pin crimped onto a wire where the wire wasn't stripped correctly, and the insulation on the wire did it's job and insulated the wire from the pin that was crimped onto it. That kind of stuff doesn't happen often, but it does happen. Also, it's possible for the shield on a wire to short to the center conductor if the wire has been damaged or if it is very old. Also verify that the labeling on the switch (both front side and back side) is correct and that the labeling matches what you see when checking the switch with the ohm meter. Let us know what you find out. Best Regards,
Wayne DelRossi Alon Aircoupe N5618F "Life begins at 50...... knots." **************New MapQuest Local shows what's happening at your destination. Dining, Movies, Events, News & more. Try it out (http://local.mapquest.com/?ncid=emlcntnew00000002)
