Moderators: robnewyork, bassiclyLouDog, gameboy

By ryanhofer
#31506
Quick question regarding Razor Dirt Quads -
I modded 1 Dirt Quad by adding a 12V battery, the other is baseline. The quads sat while I was deployed and I returned home to children begging me to get them fixed and working. The indications that I have right now are that after being on the charger for 24 hours, the lights on the throttle light up, but when I twist the throttle on both of them there is no spinning of the wheels.
Please help with additional diagnosis steps if necessary or if you know the fault immediately help me with the proper component to replace. Thanks in advance.

-Ryan
By Quinc
#31507
Google search for the manual and wiring diagram, check the fuses, make sure they are "on" etc

Take a volt meter to the batteries and verify that both batteries are putting out 12.xx volts. Also check while turning the throttle and if the voltage on either battery drops below 11. You can try charging each battery separate with a car charger, or replacing them. (best price will be on ebay)
User avatar
By zogthegreat
#31515
Hi Ryan,

ryanhofer wrote:Quick question regarding Razor Dirt Quads -
I modded 1 Dirt Quad by adding a 12V battery,.......

after being on the charger for 24 hours, the lights on the throttle light up, -Ryan


Just to clarify, your quad is running at 36v right now? Did you upgrade the charger? If your trying to charge a 36v battery pack with a 24v charger, that could be part of your problem.

ryanhofer wrote:The quads sat while I was deployed and I returned home


Welcome back, I know what it's like to deploy and leave your family behind.

zog
User avatar
By zogthegreat
#31534
The problem could be mixing old SLA batteries with new ones. You can read the technical details here:

https://electronics.stackexchange.com/q ... -batteries

But the short of it is that the newer batteries put out a stronger current than the old ones, frying the old ones. You will have to disconnect all of the batteries, drain them completely, (hook each battery up directly to the motor and run them down), then recharge them with a 3a or less charger. Check the voltage at timed intervals, (I usually go every 30 min), and see if they charge at about the same rate. If you need to replace the batteries, eBay is usually your best choice:

https://www.ebay.com/itm/12V-10AH-Wheel ... SwNuxXaYKk

Although Walmart seems competitive:

https://www.walmart.com/ip/12V-10AH-Bat ... 3=&veh=sem

If your batteries are OK, that leaves your throttle or controller. Reading through your post, you don't mention if you upgraded the controller. If you ran 36v through the stock controller, then it's probably dead. If it was me, I would rip out the controller and replace it with one of these:

https://www.ebay.com/itm/391750654895?s ... 1436.l2649

(Although to be honest, I generally rip out the controllers right away anyway! :lol: ). It will take about two weeks to arrive, but IMO it's worth the wait. It comes with a replacement throttle that plugs directly into the controller then you only have two wires for the motor and two wires for the battery to hook up. I know that the ad says 48v - 60v, but I have used one on my daughters Pocket Mod with excellent results:

viewtopic.php?f=13&t=3286

Your other choice would be this:

https://www.ebay.com/itm/36V350W-Motor- ... H-&vxp=mtr

although, if you can wait 2 weeks, you can get the same thing for 1/2 of the price here:

https://www.ebay.com/itm/Brush-Motor-Co ... fA&vxp=mtr

Modding scooters can get to be pricey, so planing out your projects and ordering from China is the less expansive way to go!

Another

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Troubleshooting Dirt Quads

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