Has anyone a circuit diagram and possibly information about the transformer output voltages for a Pihsiang mobility charger model MB-24/3 battery charger?

The chargers are expensive because they are a 24 volt, 4 Amp charger. These scooters use 2 x 12 volt batteries and provides power to one (or two) 24 volt motors. Disconnect the batteries and check the voltage of each battery and check the output voltage of the charger.

https://tops-stars.com/wiring/pride-mobility-scooter-wiring-diagram/

https://www.google.com/search?q=rascal+600+wiring+diagram

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Hi If u want a schematic the manufacturer "might" give u one but I doubt if they will they don't like giving out that information .cheers

There are a few things to consider with this type of problem.

How old are the batteries. When did you last have them tested. Is the charger output ok on load (test with an amp clamp type meter). is the charger the correct one for these batteries, small output chargers take longer to charge big batteries. Are all connection tight on batteries and anything to do with the charging circuit. Plug and socket type connection do fail on poor connections. Check voltage on batteries when on charge and off charge to see if the charger voltage is getting through to the batteries.

hi, no you don't , a compatible will do , what model shoprider mobility scooter is it please ? please bear in mind shopriders chargers a rebadge units , i have repairs hundreds of these...

Regards
Rob

www.gewizrepairs.co.uk

here is a link that may help you with your problem.

http://www.instructables.com/answers/The-red-light-on-my-Black-and-Decker-18v-cup-charg/

circuit board for model mb-24/2 battery charger

Bad connections on the battery posts is most likely. If the circuit breaker was bad you'd get nothing at the battery . The charger voltage is 29 volts when not connected to the batteries. 26 or more when connected and on.

hi
the only way the transformer can burn out is : if transformer is asked higher output that is design for or if the insolation of the winding ( transformer ) is going or gone down

Take the batteries to a battery shop or a Battery plus store have them load test the batteries. Deep cycle batteries are different from normal batteries. Normal batteries are design for max output for short periods of time, Deep cycle batteries are designed for a modest output for long periods of time. My batteries are rated at 35 amp/hr.. Basically a load tester places a load in amps [cranking amps] on the battery. How many cranking amps depends on if there is a voltage drop when you apply the load. I can apply 480 cranking amps before my voltage drops. What i do is load test a new battery of the same type to find out the cranking amps. You will not find a cranking amp rating for aq deep cycle battery but retail places have load testers that read in cranking amps. Use only deep cycle batteries in scooters, garden tracker batteries will not last. If the batteries are ok test the charger. A CHARGER KNOWS THE CHARGE OF THE BATTERY BY BATTERY RESISTANCE. As a battery charges its resistance get bigger. Once the battery reaches a preset resistance the light goes solid. You can have the charger checked by a battery shop. To properly charge a battery a charger will put out 27volts @ 4amps, they can easily test for voltage. Now if the charger is built in there is going to be an external fuse find it, check it. hope this helps

Blue Positive Brown negative, Yellow with green stripe is additional ground. many people are trying to use the 2904JT charger for a 24 volt charger for other things. I am using mine on an e bike that has 4 12 volt batteries. I charge them 2 at a time and it works well. It only shows voltage when the batteries are partially charged. Some kind of safety feature to keep you from charging a shorted battery. No schematics available, I took my chances and verified the Blue wire is positive. lol Good luck with you project or re wire. : )