DCwom 78 #1 Posted December 11, 2023 So I've got a new ignition switch, the typical 5 lug type with Magneto, Battery, Start, Accessory, Coil. When I buzz it out with an ohmmeter I find that the Battery and Coil are not connected when the key is in the start position, only when in the run position. This would mean that the engine won't start when the starter is engaged, only when the key is released and the coil is energized. Your can crank all day and it won't start until you release, does this make sense? Share this post Link to post Share on other sites
ebinmaine 67,768 #2 Posted December 11, 2023 What's the switch part number? Can you clearly see all 5 terminals? Any pics? On a MAG engine that could be correct. The coil would be grounded to shut off the engine. Share this post Link to post Share on other sites
ri702bill 8,387 #3 Posted December 11, 2023 I agree - AND, they appear to be the same...... but oh-so different. 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,072 #4 Posted December 11, 2023 If the switch has a magneto terminal it never makes a connection with the battery because that would release the magic smoke from the ignition module. Have never seen a switch with a magneto terminal and a coil terminal. Plus have never seen a coil terminal on a switch. 4 1 Share this post Link to post Share on other sites
953 nut 55,394 #5 Posted December 11, 2023 5 hours ago, DCwom said: new ignition switch There are dozens of five terminal switch configurations out there, What Wheel Horse is this going on and what is the number of the switch you bought? 1 Share this post Link to post Share on other sites
DCwom 78 #6 Posted December 12, 2023 45 minutes ago, 953 nut said: There are dozens of five terminal switch configurations out there, What Wheel Horse is this going on and what is the number of the switch you bought? The horse model isn't really relevant since the ignition system has been rebuilt/wired in a simple battery, coil, starter, configuration, no accessories, lights, meters. What I need is a simple switch that powers the coil on run and start, and triggers a solenoid while on start. This is the switch I tried, it does have a magneto terminal so maybe that explains the non-connect. https://www.amazon.com/dp/B07ZHDMM4R?psc=1&ref=ppx_yo2ov_dt_b_product_details 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,072 #7 Posted December 12, 2023 103991 is a 6-terminal switch with a ground terminal for magneto ignition 103990 is a 5-terminal for battery ignition 1 3 Share this post Link to post Share on other sites
Achto 27,641 #8 Posted December 12, 2023 11 hours ago, DCwom said: What I need is a simple switch that powers the coil on run and start You need a switch that has an "I" = "ignition" terminal for battery ignition. A switch with a "M" = "magneto" terminal will not work for a battery ignition. Share this post Link to post Share on other sites
953 nut 55,394 #9 Posted December 12, 2023 As @gwest_ca said above, chances are you will find that a 103990 will get you going. Check out this post Garry and I did a couple years back. Share this post Link to post Share on other sites
DCwom 78 #10 Posted December 12, 2023 3 hours ago, 953 nut said: As @gwest_ca said above, chances are you will find that a 103990 will get you going. Check out this post Garry and I did a couple years back. Just what I was looking for, thanks @953 nut & @gwest_ca I wish this old thread came up on my searches, I definitely have the wrong switch. I'd think this old thread would be a good candidate for a pin in the electrical forum because it explains so much in a very compact form. Share this post Link to post Share on other sites
953 nut 55,394 #11 Posted December 13, 2023 6 hours ago, DCwom said: . I'd think this old thread would be a good candidate for a pin in the electrical forum because it explains so much in a very compact form. This thread and many more are found in the https://www.wheelhorseforum.com/ Refrance Section. Share this post Link to post Share on other sites