Small Engines (Lawn Mowers, etc.)/Lx188 won't start with key


John Deere lx 188 does nothing when turning the key. Won't jump off battery which is brand new. Can get it started by hooking battery charger up to the starter and jumping the solenoid. Mower with drive back in forth. The blades engage and work fine. Then I remove the battery charger cables and it dies right away. Idk thinking ignition switch which is the whole circuit board. Oh and both fuses are good and have power

There are several relays and safety switches...any of these components could cause the problem.

A bad switch may be preventing a relay from working.  Wiring diagram URL below:

Do you have a volt meter and are you familiar with reading schematics?

You will have to do some electrical testing to determine what is causing the problem.  You don't need an expensive volt meter to perform the tests, a $5 Harbor Freight meter works fine if you know how to properly use it.


Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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