Midnight-rider-420 0 Posted September 10, 2022 Atv Honda TRX 420fm 4x4 has no spark but got electrical power everywhere else Any help will be much appreciated Share this post Link to post Share on other sites
shadetree 5,969 Posted September 10, 2022 16 minutes ago, Midnight-rider-420 said: Atv Honda TRX 420fm 4x4 has no spark but got electrical power everywhere else Any help will be much appreciated is the neutral light on when you turn the key on ?. it will not fire if the neutral light isn't lit up. Share this post Link to post Share on other sites
Midnight-rider-420 0 Posted September 10, 2022 Yes green neutral light comes on Share this post Link to post Share on other sites
shadetree 5,969 Posted September 10, 2022 5 minutes ago, Midnight-rider-420 said: Yes green neutral light comes on kill switch in the center on left handle bar ?. Share this post Link to post Share on other sites
Midnight-rider-420 0 Posted September 10, 2022 Yup in the run position Share this post Link to post Share on other sites
shadetree 5,969 Posted September 10, 2022 11 minutes ago, Midnight-rider-420 said: Yup in the run position ok, try a new spark plug, plug it into boot, lay it on engine somewhere, crank it over, watch for spark, if it does not spark ?, then chances are the c.d.i. is bad ?, or the stator is bad ?. Share this post Link to post Share on other sites
shadetree 5,969 Posted September 10, 2022 before you rush out and start buying parts ?, check the wire harness at all connections to make sure they are clean and tight ?, also check for any mice chewing damage on the harness ?. check all fuses as well. Share this post Link to post Share on other sites
jeepwm69 7,719 Posted September 12, 2022 Do what shade said. The 420's have a few sensors that will mess you up. If you run a jumper wire from battery positive to the black/red coil wire (leave it plugged onto the coil, just pull the connector back a hair and touch the jumper to the terminal) will it start then? Share this post Link to post Share on other sites
Midnight-rider-420 0 Posted September 12, 2022 Ran a jumper wire and still no spark Share this post Link to post Share on other sites
Midnight-rider-420 0 Posted September 12, 2022 43 minutes ago, jeepwm69 said: Do what shade said. The 420's have a few sensors that will mess you up. If you run a jumper wire from battery positive to the black/red coil wire (leave it plugged onto the coil, just pull the connector back a hair and touch the jumper to the terminal) will it start then? Ran a jumper wire and still no spark Share this post Link to post Share on other sites
jeepwm69 7,719 Posted September 12, 2022 Well, try checking connectors like Shade said. Look for blown fuses, check to make sure power is coming in and out of each fuse (check the wires UNDER the fuse block, as sometimes the fuse won't make a good connection to the terminal). Share this post Link to post Share on other sites
toodeep 1,759 Posted September 12, 2022 What year is your machine? Is the fuel pump cycling when you turn the key switch on? Share this post Link to post Share on other sites
Midnight-rider-420 0 Posted September 12, 2022 11 minutes ago, toodeep said: What year is your machine? Is the fuel pump cycling when you turn the key switch on? It's a 2009 model with power steering. Yes the pump cycles and everything else comes on(dash, fuel pump even off/on switch works when key is turned on) just no spark. Ran almost a whole day then just lost spark. Share this post Link to post Share on other sites