Voltage Reducer Tutorial / Installation for Lithium or Lead Acid Batteries EZGO TXT 48v 

Can’t adjust on this voltage reducer.

i'd like to know that myself. my lithium battery is the same. when i swapped everything over, my radio, speakers, and underbody LEDs work, but light kit and horn do not.

@@macmccall2314 Mac, I did more research on this and found out since I already have a voltage reducer installed that I should leave it there and just swap the 48v connections from the lead acid over to the 48v connections on the lithium pack, leave all the accessories hooked up to the reducer the way they are. Sounds way easy enough!

@@macmccall2314 I'm wondering if your light kit was run off the batteries while all your other accessories were hooked to the reducer maybe? If so you need to find those wires and either run them off your 12v side of the voltage reducer (if the amperage on the reducer is high enough for all you have hooked to it) or connect them to the 12v connections on the lithium pack if you have that option on your pack.

@@mygt8a4re when i swapped everything, i put everything from the pack neg and pos onto the 48v neg/pos on the lithium pack. then i had a blue wire from the light kit harness that was on a single battery negative. I had 6 8v batts in the old setup. I do have 12v pos/neg on the lithium battery. It's got to be something simple but i can't figure it out.

@@macmccall2314 I know on most light kits the main power wire is blue, but it wouldn't be hooked to a negative source. The way golf cart batteries run in series it was most likely a point where it read 16v pos, your 2nd 8v battery in a series connection. Most light kits can handle 16v. Take the blue wire and connect it to your 12v pos on your lithium pack. I can only assume that the light kit is still grounded somewhere. Did you have another wire left over? You may have to follow the wires from your light kit to be sure you have both a pos & neg connection wires for the lights

Get a volt meter and find a wire behind the key that has 48v when the key is on and zero volts when the key is off. Run the hot wire to that and negative to you main negative on your battery pack

@@jbgolfcarts Awesome, I will try it. Thanks!!

You’ll have cables coming from you controller and solenoid. That’ll be you main positive and negative. If you still can’t figure out which it is follow the back of your charger port. Those wires have to go to your main positive and negative to charge the batteries.

This converter doesn’t have a key option. You can wire the positive to the key when it’s on and zero volts when off. The 18amp does have an additional wire for the key switch.

I have the same question. Im wondering how to hook it up behind the ignition because i dont want it to constantly have power.

You should install a simple 2-prong on-off switch so u can address the constant draw question. Without it, it’s always drawing…

Mine draws 1/4 amp on standby on my lead acid batteries so I turn the +36 volt input off by a relay operated with the key switch.

Yes. Just make sure the toggle switch can handle 48v.

@@jbgolfcarts thanks for the reply. Can you give me a link or specs of a switch. I am only powering LED Light kit. I can’t seem to find a 48V switch. 🤪

@@jbgolfcarts lol 🧸

Standby current is about 1/4 amp so without a key on relay this will eventually drain the battery.

No. I usually don’t like mounting electrical stuff like a voltage reducer on metal. If somehow it grounds since it’s on metal it could catch it on fire.

No. If it grounds it’ll blow the reducer and if that doesn’t happen then it’ll pop the fuse on the 48v positive side.

Couldn't hurt to also fuse the 12 volt side.

14+ EZGO TXT Basic Light Kit from my website JBCarts.com

I’m not sure what you mean. One Neg is for 12v and the other Neg is for 48v. You can’t put the ground wires together.

Can you explain? I got nothing from Google

yes - I had the same thought. To get to 12 V x 20 amp = 240 W ..... 240 W / 48 V = 5 amp

@@4heitjer For the amp draw on the 48v side what decides how many amps is drawn? Is the amp draw on the 48 volt side determined by the amp draw on the 12 volt side?