93 TXT 36V dropping power

[mkz]

When I press the accelerator, it will drive good for about 10 seconds and then quickly start losing power. By the time I get back to where I was parked, I could probably push it faster than it moves.

I have 6 brand new fully charged batteries. I have load tested them with a battery load tester and all hold fine. I have also replaced all the battery cables. From this point, I am not sure what to go check next. Thanks for any help.

[JohnnieB]

Welcome to BGW!

What is the battery pack voltage when measured 12 hours after the charger shuts off automatically.
Should be 38.2 for the pack and 6.37V for each battery.

What is the battery pack voltage when cart is misbehaving?

What is the voltage between the controller's B- and B+ terminals when cart misbehaves?

What is the voltage between the controller's M- and B+ terminal when the cart misbehaves?

[shaffer88]

Originally Posted by JohnnieB

Welcome to BGW!



What is the battery pack voltage when measured 12 hours after the charger shuts off automatically.

Should be 38.2 for the pack and 6.37V for each battery.



What is the battery pack voltage when cart is misbehaving?



What is the voltage between the controller's B- and B+ terminals when cart misbehaves?



What is the voltage between the controller's M- and B+ terminal when the cart misbehaves?

Is it you or crashdummy that has the chart showing what the voltages are based on the percentages drain I seem to meet be able to find that.

[mkz]

Could you tell me how and where to measure that at? I'm sorry, but I am new to this. Thank-you for your help.

Originally Posted by JohnnieB

Welcome to BGW!

What is the battery pack voltage when measured 12 hours after the charger shuts off automatically.
Should be 38.2 for the pack and 6.37V for each battery.

What is the battery pack voltage when cart is misbehaving?

What is the voltage between the controller's B- and B+ terminals when cart misbehaves?

What is the voltage between the controller's M- and B+ terminal when the cart misbehaves?

[JohnnieB]

Originally Posted by shaffer88

Is it you or crashdummy that has the chart showing what the voltages are based on the percentages drain I seem to meet be able to find that.

Here they are for Trojan Battery and US Battery

[JohnnieB]

Originally Posted by mkz

Could you tell me how and where to measure that at? I'm sorry, but I am new to this. Thank-you for your help.

Originally Posted by JohnnieB

What is the battery pack voltage when measured 12 hours after the charger shuts off automatically.
Should be 38.2 for the pack and 6.37V for each battery.

What is the battery pack voltage when cart is misbehaving?

What is the voltage between the controller's B- and B+ terminals when cart misbehaves?

What is the voltage between the controller's M- and B+ terminal when the cart misbehaves?

First you need a DMM (Digital Multimeter). An inexpensive one in a blister pack from a discount or auto parts store will suffice.
It should resolve voltages under about 10V down to 1/100 volts (IE: 6.37V) and under about 50V down to 1/10 volt (IE: 38.2V)

All of the heavy cables in the battery pack except two, connect to another battery. Measure between the battery post those two cables are connected to. In the case of a TXT cart, they will be the front and rear battery on the passenger side.

That will be the Battery Pack voltage. To get a voltage reading that us usable to estimate the SoC (State of Charge), you have to let the batteries rest about 12 hours after they have been charged.

The individual battery voltages are measured between the two posts on the same battery. They cables do not have to be disconnected to measure the battery voltages.

The controller is mounted to an aluminum heatsink sitting in front of the passenger side wheel well, under a plastic cover that is held on by four nuts.

Protruding from the top of the controller are three or four heavy terminals that are labeled B-, B+ and M-. If it exists the fourth heavy terminal is labeled A2.

To measure between the terminals listed while cart is in operation, you will need some clip leads to attache the voltmeter's test leads.

Originally Posted by shaffer88

Is it you or crashdummy that has the chart showing what the voltages are based on the percentages drain I seem to meet be able to find that.

i use johnnie's when i post the chart

[kernal]

MKZ, In '93 cart could be either a Medalist or a Marathon. (TXT '96 and up)
If its a Medalist the batteries and controller will be as JohnnieB described ( or similar ). If Its a Marathon the batteries will be split with 3 on each side and the controller in the middle.

Are you any relation to the Lincoln?

[mkz]

Thank-you Johnnie. I am going to fully recharge them and let it sit 12 hrs. Then do the tests and get back to you. I really appreciate the help.

Originally Posted by JohnnieB

First you need a DMM (Digital Multimeter). An inexpensive one in a blister pack from a discount or auto parts store will suffice.
It should resolve voltages under about 10V down to 1/100 volts (IE: 6.37V) and under about 50V down to 1/10 volt (IE: 38.2V)

All of the heavy cables in the battery pack except two, connect to another battery. Measure between the battery post those two cables are connected to. In the case of a TXT cart, they will be the front and rear battery on the passenger side.

That will be the Battery Pack voltage. To get a voltage reading that us usable to estimate the SoC (State of Charge), you have to let the batteries rest about 12 hours after they have been charged.

The individual battery voltages are measured between the two posts on the same battery. They cables do not have to be disconnected to measure the battery voltages.

The controller is mounted to an aluminum heatsink sitting in front of the passenger side wheel well, under a plastic cover that is held on by four nuts.

Protruding from the top of the controller are three or four heavy terminals that are labeled B-, B+ and M-. If it exists the fourth heavy terminal is labeled A2.

To measure between the terminals listed while cart is in operation, you will need some clip leads to attache the voltmeter's test leads.

[mkz]

Kernal,
Based off your descriptions it is a Medalist, which I'm sure is good info for me to know.

The Lincoln? I'm not sure who that is.

Originally Posted by kernal

MKZ, In '93 cart could be either a Medalist or a Marathon. (TXT '96 and up)
If its a Medalist the batteries and controller will be as JohnnieB described ( or similar ). If Its a Marathon the batteries will be split with 3 on each side and the controller in the middle.

Are you any relation to the Lincoln?