How do I know if my jet 3 ultra is charging? I just bought a used one today and do not have a manual

Question edited for clarity.

You have a dead short somewhere. You need some electrical knowledge and a digital multimeter for testing. Take all the covers off. Look for wiring that has rubbed through and touching or melted. Disconnect one of the motors and replace the fuse. If it still blows, reconnect that one and disconnect the other motor. If one motor doesn't blow and the other does, you know you have a faulty motor. If neither stop the issue, then you move up to the controller and look up there. With a meter you can check for shorts within the motors, as well as grounds.

Or just take it to a Service Centre and have it repaired and serviced properly.

Basic troubleshooting

INFINFB2045 Jet 3 Ultra Troubleshooting

Pride Mobility https://www.pridemobility.com > pdf > infinfb2... PDF troubleshooting instructions for the Jet 3 Ultra Power Chair. This information is to be ... A blown charger fuse can cause the charger inhibit to activate.

• 
  

  JET 3 ULTRA

  https://www.pridemobility.com > pdf > us_jazzy
  PDF
  Jet 3 Ultra www.pridemobility.com. 3 ... If the circuit trips, allow your power chair to "rest" for approximately one minute. ... thermal fuse on each lead.

INFINFB2045 Jet 3 Ultra Troubleshooting
https://www.pridemobility.com/.../troubleshooting/infinfb2045_jet_3_ultra_ troubleshooting.pdf
File Format: PDF/Adobe Acrobat
troubleshooting instructions for the Jet 3 Ultra Power Chair. ... What if the systems on my Jet 3 Ultra seem to be "dead" (controller does not light up when the on/off key is ... you continually allow the battery condition meter LEDs to fall into the red area, the ... 1 Flash. The batteries need charging. Check the battery connections.

https://www.manualslib.com/j/jet+3+ultra.html


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You should charge the batteries overnight every day you use it and every few days if not using to get the most life. If it is not going to be used for weeks or months you should charge the batteries then either remove or unplug the batteries from the main control box if possible.

i take it this is a used chair,u just bought someone elses problem,sorry,begin by checking voltage of batterys,after they are charged,then see if if it powers on,if it doesnt,id ask for my money back,or u can hire a tech to look at it and give u a written report on what it will take to fix it

Jet 3 is typically 50 amp.

The controller is 40 amp.

What do you mean transformer?

Are you trying to charge? Do you have an onboard charger or separate unit?

I owned a medical equipment company for 10 years, so I know a bit about these, please provide more specifics as to what you are needing.

Mark Batteries your charger is putting our enuf 13.15 volts for each battery so after charging all night you should be reading about 13 volts on each. If your batts are only 12 volts after all night charge then batteries are weak Hope this helps

acampbel I went to pride website and could only find the manual for the Jet 3 ultra. I don't know if that manual can help you but goto pridemobility.com and select Jazzy chairs, scroll down until you see the picture for the Jet 3 Ultra click on the picture and you can download the manual from that page. Hope this helps you

http://www.pridemobility.com/jazzy/jet3.asp

this should be of help.

If the batteries sit for over a couple months, you'll have to replace them. They are U1 type (pair).