Checking starter relay
Have you checked to make sure the security system hasn't tripped? These cars are very touchy when it comes to that. Also make sure your signal wire to the starter was hooked back up.
HOW DO YOU RESET THE SERVICE INTERVAL INDICATOR ON
You can take it to a garage that can run diagnostics on your vehicle, as you need to plug in a laptop that has the diagnostic program on it and switch off the indicator. This also goes for engin mangement lights, airbag warning lights etc. As long as the garage has the correct diagnostic program they caan reset all the dash lights you want resetting. Hope this helps ;)
Have a Kidtrax 12v land rover defender, fully charged the battery, checked output is 12v, but it barely moves
There are possibilities that come to mind.
The first (and I'm not familiar with your specific ride-on) is, often there is a speed limiter that only a parent can remove. It generally limits the speed to 1/2 full speed. Most often this is a screw located on the accelerator pedal that limits the pedal travel to 1/2 full range. Removing this screw will allow the toy to travel about 5 mph.
The second is the battery. Just because it develops 12 volts is no real indication that it can supply sufficient current to the motor. (Think CCA's as related to a car battery). Over-charging by leaving it connected more than 24 hours, or running it completely will damage these batteries and they wi never be able to produce sufficient output.
If there is no limiter artificially holding the speed down, I would try a new battery. Amazon has the best prices.
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