Razor E100 Scooter Troubleshooting and repair

The most common problem with Razor electric scooters is dead or dying batteries. The second would be the controller box and the third would be broken wires. Hopefully, the steps in this article will help you identify your problem. Also I filmed all process on video and it will be available soon on my youtube channel. So to do the testing you will need a multimeter. If you don’t have one I provide links at the end of this post. So you can order it at Amazon.

Power adapter test

Before we test scooter let test charger, plug it in and We are just going to be testing it on DC voltage.

Razor battery charger

Measure voltage between sockets 1 & 3 it should be about 27 - 28 volts without load, mine showing 28.3 volts.

Power socket

If output is zero or less than 24 volts your charger is dead. Use this link to get a replacement.

By the way you might also want to wiggle this around while you’re testing it just to see if it fluctuates here if it does you could have a kink inside or a broken wire inside something like that that’s stopping it from charging the batteries.

Disassemble deck cover

To access internals you need to disassemble deck cover it secured with 6 screws, so use phillips screwdriver and unscrew it. Then remove cover.

Deck cover

Battery test

After cover is opened, disconnect batteries from the controller, and measure output voltage for each battery, it shoud be about 12 volts or more. Mine batteries show 0.8 and 1.9 volts so this is values of dead batteries. So if your battery is dead you have two options try to restore it or buy a new ones.

Battery test

Battery repair

I decided to repair battery. To to this open it’t top plastic cover first.

Battery cover

Then remove rubber cups, my butter has 6 caps.

Battery rubber cups

After that refill battery with distilled water. I use straw to to this.

Battery refill

Connect battery to Car Battery Charger and select recovery/maintenance mode. At the start battery can’t accept charge so keep it on this mode until it starts accepting charge. I keep it about 20 hours to be restored.

Battery charger

After 20 hours battery ready to be used. Put rubber caps back and the put top plastic cover on place. I use scotch to keep it in place.

Battery recovered

Throttle test

The throttle has two switches inside one that hooks up with the orange wires the other one that hooks up too with the brown wires. So we’re going to take our meter and then shove these leads in matching sides. So shove them there in the orange side, meter should be in continuity mode. Then just pull the throttle and your should hear beep so we know that switch is good. There’s another one in there so we’re going to test the brown the same way. If you didn’t hear a beep you will need a new throttle.

Throttle test

Brake test

The other wires coming out of the front are the brake wires and this is an easy test because it should be without you hitting the brake so I can get these leads in you’ll hear the beep okay and when you pull the brake lever it’ll stop

Also near brake handle there’s a little switch and you should hear a click when you pull the brake usually when you hear a click it means the switch is good.

Motor test

Motor will have a certain amount of resistance and I don’t know what a brand new motor will test that but I know this one works so this will give you a really good idea of the resistance of a working motor see this big thick wire this one goes straight through the back to the motor. Mine motor resistane is 6.3 omhs.

Motor

Reset switch

Little thing with button on the side is a safety trip in case the voltage surges. If you use meter on it it should be continuity all the time. If meter not beeping try press a little button on the front so you can reset it. So if you don’t hear a beep then that might be a problem with it.

Power button test

When you turn it on it should be continuity between bottom two leads.

Controller test

To test controller be sure first that all other parts ok. It should be at least good battery and working throttle, wire harness, power button. THen pull the throttle and your should hear a click sound inside controller. If you don’t heard it, probably relays inside controller is dead. If you don’t have special skills, just replace the whole controller.

Tools used in this build:

Replacement parts

I’m working on an E100 but these parts may also work on Razor Power Core E100, E125, E150, and other scooters. Just check the part numbers.

Also check your Razor E100 version number as I shown before.

Find out E100 wiring diagram on the picture below

E100 Wiring diagram

Best of luck with your repair!