Hello,

I have a BMX 70 mini atv and the starter button doesn't work. I have ordered and been sent the wrong handlebar control twice now so have given up on that.

Does anyone know how to wire up a simple push button starter.

Thanks,
Jeff

 

Here is basic diagram for the starting system on your quad:



Not how this is called "Plan B". There is another common wiring scheme (Plan A), but I've never seen this scheme used on a quad with a remote module installed.

Note how it works:

To close the starter solenoid you need to have 12 volts applied to the actuating coil (two small wires on the solenoid). In Plan B one side of this actuating coil is grounded all the time. The other wire is fed 12 volts if and only if:

1) The battery is charged up at least a little
2) The fuse is not blown
3) The ignition switch is on
4) The brake switch is closed (brakes applied)
5) The start button is pushed

When all of these conditions are met then 12 volts is applied to the actuating coil, current flows in the actuating coil generating a magnetic field, which sucks down a steel plate, which connects the two screw posts on the solenoid together, which connects the battery directly across the starter motor (which starts turning).

So a really simple way to do this is find the brake switch wire feeding the brake light, tie into that wire and run it to your new starter switch. The other side of the starter switch goes to the solenoid small wire that is * not* grounded all the time. For this to work the items 1-4 above must be working or you won't have 12 volts to apply to the solenoid with your new starter button.

If you don't want to have the safety interlocks at all you could run the hot side of the starter button to the output side of the fuse. Then the starter relay would close, and the starter would turn no matter what when you push the button (well, if you have a good battery at least). Personally I wouldn't do this - especially for a kids quad - since there would be nothing to prevent starting up the quad in gear and having it take off unexpectedly...

 

Many thanks to you again Lynn,

You are the Man!

Jeff

 

Glad to have been of help .