Installing braking resistor in 2015 EZGO Express S4 HO

JodyW

New Member
I recently upgraded my batteries from lead acid to lithium. With the kit I purchased there is a breaking resistor which, after some research, I think I understand the function. My problem is I cannot seem to find any videos/articles that talk (in easy to understand English) about where to connect the two cables (look like positive and negative). I called the place I bought the batteries and they admitted they were not sure and suggested just connect to battery terminals. After closer observation I realize there is a terminal made specifically for the red cable (has a smaller than normal ring terminal) so I feel good that it is connected correctly. But the black cable (also ring terminal that is same size as normal battery terminal). I already had my limit of terminals (based on available post space) on the negative battery post, so I was told to connect it to the frame for ground.

I found one video online that was not specifically for a golf cart, and it was almost impossible to understand their English (Asian created the video. In the video they showed connections that looks more like it was connected to the controller. I want to make sure what the best method is.

Does anyone have any experience installing one of these? Battery is a RoyPow S1105P and the resistor does not have any manufacturer label.
 

Diode

Cartaholic - V.I.P. Sponsor
A breaking resistor it would have to be huge or a nichrome wire setup like the old five solenoid carts and they usually have a relay that goes with it and the controller turns the relay on and then puts the energy to the resistor instead of the batteries where did you get this resistor and who told you you needed it
 

JodyW

New Member
The resistor came as part of a "lithium upgrade kit". I bought it at 18650 Batteries. I had never seen or heard of such a thing prior to purchase. I have only had it for a couple of weeks and only used the cart for about 3 rounds of golf. Warning that came with it talks about how hot it can get but when I touch mine after a round it is stone cold., thus the reason for my question. Unless someone can tell me how to install it, I am going to just remove and see how things go. Based on what I can find, it looks like unless you are going down a lot of hills it is not necessary. I did not have one when the cart had Trojan T875 batteries.
 

Diode

Cartaholic - V.I.P. Sponsor
Pretty hard to tell you how to do something when we can't see it pictures are good
 

JodyW

New Member
You asked for pics, here they are. I was hoping someone in this forum had previous experience with having installed a brake resistor. One pic is of the device and the other is the cable ends. Notice the smaller ring terminal on the red cable. It fits to the battery on a post labeled specifically Brake Resistor. Just can't figure out where to connect the black cable where it would make sense. I have it physically mounted behind the lithium battery.
 

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Diode

Cartaholic - V.I.P. Sponsor
Little confused here but I probably was before I read this the red and black wire you have pictured does it come from the picture on the left I don't see any large wires going to that silver box
 

JodyW

New Member
The red and black wires do indeed come from the brake resistor pictured in the left. Hard to see in the pic because I have the excess tied up. The cables are about 3ft long and fairly thick gauge. You can see in the picture on the left where the cables exit the device. The slack is out of view.
 

JodyW

New Member
The cables are both white with red and black ends on them as pictured in the right picture.
 
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