Kid Trax Power Wheels 6v to 12v Upgrade

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Introduction: Kid Trax Power Wheels 6v to 12v Upgrade

I created this instructable because I couldn't find any source on the internet where someone converted one of these from 6v to 12v. Being a typical Dad I put a 12v battery in it and it worked awesome for....45 seconds until the relay board was fried. I am sure this will work for multiple kid trax 6v units, this one was the Honda 4 wheeler atv model.

This instructable will show you how to wire in a new 12v relay on a Kid Trax Power wheel. Cost was $1.58. Do this at your own risk. The motor may burn out faster as it was sized for a 6v system.

Step 1: If You Put a 12v Battery in This Will Happen...

I assumed that these units were made to 12v specifications and they are not. This 2 channel 6v relay board is under the unit in a panel accessible by 4 screws. As you can see on the bottom of the green circuit board the wire melted and acted like a fuse. Cut this out, clipping the wires as close to the board as possible and throw out the board. I mounted my 12v battery under the front axle with some wood and zip ties.

Step 2: Buy a 2 12v Channel Relay

I found this one from Chinese girlfriend for $1.58. I got a 30A but, make sure you have a fuse/circuit breaker coming off the battery.

Step 3: Wire It In!

On the right side of the relay board:

  • you have your + and - 12v power
  • the small blue and white wires are the "triggers" this is forward and reverse on the controller of the car.

On the left side you are building a H bridge circuit as shown in the wiring diagram

  • The big blue and white wire go to the motor (or com1 and com2)
  • when you get everything wired you will need to test reverse and forward directions to make sure you have the correct blue and white wires in the correct relay slots.
  • in the interest of time, I stripped the wire and connected a lead to make a "Y" type cable. I think took a piece of paper and cut a hole in it. I than had a can of spray plastic dip and sprayed the connection through the hole in the paper. You can see this in the photo on the red cable.
  • I have many other things going on in this 4 wheeler, so I used wire caps to tie it all together, tucked it all back in the panel and put the cover with the 4 screws back on.
  • Hopefully this will save you a lot of time, I spent too long trying to determine what made this tick.

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    50 Discussions

    0
    zman88
    zman88

    Question 6 weeks ago on Step 3

    I am just trying to replace a relay on a 12v and not sure if I am correct or where to go next if I am so far, any help would be much appreciated. Thank you.

    20200527_183036.jpg20200527_183036.jpg20200527_183031.jpg
    0
    philo171
    philo171

    Answer 6 weeks ago

    Draw a wiring diagram and post it pict of it. I can't tell what is going on old board.

    0
    zman88
    zman88

    Reply 6 weeks ago

    This is a 12v I am just trying to replace the relay board the old one fried a wired and couldn't fix it this is what I've got for wires not sure where they go I have a 2 channel that I was going to hook up. But to many wires so I have a 4 channel on order not sure where the wires all need to go?

    20200530_143636.jpg20200530_143639.jpg20200530_143643.jpg20200530_143644.jpg20200530_143648.jpg20200530_143655.jpg
    0
    Samson2001
    Samson2001

    Reply 5 weeks ago

    Hi zman, we really need to know what’s at the other end of all your wires. In theory, if there is only 1 motor, you need to follow the circuit diagram in the instructable above for your motor and power in side, but for your input side you need to know what all the littler wires do

    0
    zman88
    zman88

    Reply 26 days ago

    Ok so we have purple and gray and pink all going to the forward reverse switch and black, red, brown, pink and orange goint to the power pedal if that helps idk i can't get it apart to really see the power pedal wiring here hes the wiring to the forward reverse

    15923464003381333583170446886569.jpg
    0
    Nycxsir1
    Nycxsir1

    Question 6 weeks ago

    Hi, has anyone tried doing a 12v to 24v conversion using the same setup? I have a kid trax fire truck and I fried the control board once I hooked up two 12v 7ah batteries in series. My question would be, do I order the 2 - 24v channel relay instead of the 2 - 12v channel relay posted on this instructables page? (it makes sense in my mind to get the 2 - 24v relay). Thanks

    0
    philo171
    philo171

    Answer 6 weeks ago

    You could do it with the same relays. If you look on the relays they have a voltage rating, in the pict here it has 30vdc so these would work. Also motors should generally be hooked up in parallel.

    0
    Nycxsir1
    Nycxsir1

    Reply 5 weeks ago

    Hi. Thanks for the response. The motors are wired as they are from the factory... Which I suppose would be in parallel so the wheels will turn the same direction. I was referring more to how the batteries are wired. I have two 12 volt batteries wired in series to create a total of 24 volts output.

    0
    philo171
    philo171

    Reply 5 weeks ago

    Cannot stress this enough- get a 30amp fuse/breaker coming off the battery as well. All aux are running off a separate battery. The relays are all heavy duty 30amp as well.

    0
    Samson2001
    Samson2001

    Reply 5 weeks ago

    30vdc refers to the voltage at which it can sustain 10A. The modules themselves require 12v to function so you would need a 24v module setup.

    0
    Nycxsir1
    Nycxsir1

    Reply 5 weeks ago

    Hi, thanks for the response. Just to confirm. You are saying I will need to use the two 24 volt channel relay pictured.

    Screenshot_20200602-121531.png
    0
    Samson2001
    Samson2001

    Reply 5 weeks ago

    The relays look like the right ones for 24Vdc, just make sure the board is also designed for 24V to power it. Just be careful if you are putting 24V onto 12V motors as they will run very hot and could burn out so keep an eye on those temps (I would never recommend over volting motors, but I know people have done it before and got away with it). The other thing to look out for, is if you have lights and things on the circuit, they might not work as expected either.

    0
    Samson2001
    Samson2001

    5 weeks ago

    That’s some brill help esp with the h bridge wiring there. One thing I did note however, I brought 2 12v 23000rpm motors, at no load (ie just spinning wheels in the air) it draws 2.83a, so not to bad, but when blocking the motors (ie, if you kid gets stuck in mud or to the point the wheels stop turning) it draws just over 50a between the 2 motors. So if using the vehicle on grass or you’ve got a kid that’s not a tiny toddler I’d recommend upwards of 30amp relays, make sure your wiring is 2mm or over on your power side.

    I’m currently about to hash in a couple of 40amp automotive relays using the basic circuit principle as used above to see how they hold up.

    However, another thing I may look into is a pwm speed controller, it looks like you can even get them with soft start that could be good if your ride on now just wheelies off the line everywhere.

    2
    TatianaY1
    TatianaY1

    1 year ago

    If you planing change power board I decided add is a picture with wire description I hope some one will find that info useful. If someone will decide keep existing board than you will need change 2 relays 15A 12VDC/125VAC Relay Switch $2 each from radio shak Catalog #: 2750031below is a link also you will need replace 2 diode 12V 15Amp
    https://www.radioshack.com/collections/relays/prod...
    Thank you.

    Factory relay board.jpg
    0
    Nycxsir1
    Nycxsir1

    Reply 6 weeks ago

    Hi, has anyone tried doing a 12v to 24v conversion using the same setup?
    I have a kid trax fire truck and I fried the control board once I
    hooked up two 12v 7ah batteries in series. My question would be, do I
    order the 2 - 24v channel relay instead of the 2 - 12v channel relay
    posted on this instructables page? (it makes sense in my mind to get the
    2 - 24v relay). Thanks

    0
    keithhegarty
    keithhegarty

    Reply 3 months ago

    Could you tell where i could get a new board same as the 1 in picture ..its for bmw i8

    0
    Nissantun3r
    Nissantun3r

    Reply 2 months ago

    I tried looking for one a few months ago with no luck. Most of us on this thread have purchased the new 12V relay shown and wired it up plus its an upgrade because you won't fry it while using 12V batteries. I just did mine today. I have the kidtrax Mercedes glk450 6V ride on.

    0
    Nissantun3r
    Nissantun3r

    Reply 4 months ago

    Hello I have the control board that you posted a photo of. How do I wire it to the 12V relay purchased by original poster?

    0
    Stealth2007
    Stealth2007

    Reply 3 months ago

    I just found this, I have the same board that went out and trying to convert it to the board above. Any help?