what to do on 90ds

[rednekroper05]

ok i have a 90 ds that i believe the batteries are dead in. It will charge a little and run but the guage never show it is getting a good charge it just blinks. Am I right in my assumption?


Also I am sure there are other threads asking the same thing but what can i do to make it able to handle large knobby tires and travel more than 5-8 mile per charge.

[scottyb]

First step is to determine what type of speed control system you have. Is there a speed control box or is there a row of resistor coils behind the batteries?

Can you put a voltmeter on those batteries?

[rednekroper05]

there is a row of coils.

[scottyb]

If you have a row of coils behind the batteries then you have a 36v resistor coil cart. You should have six 6v batteries. They should all read above 6.0 volts on DMM, digital multi-meter.
It can be converted to modern Solid State speed control which will increase run time and allow you to put more voltage to your motor to turn those big tires you want.
The bad news is you better start winning every jackpot to pay for it

[Scott H.]

Originally Posted by scottyb

It can be converted to modern Solid State speed control which will increase run time and allow you to put more voltage to your motor to turn those big tires you want.
The bad news is you better start winning every jackpot to pay for it

ScottyB is right about the conversion costs as I have checked into it myself.

Another option you have, and the one I'm going with myself on my 80's DS, is to find someone selling a newer cart that is trashed except for the wiring & controllers to use as a parts cart. Just take GOOD PICTURES of everything while you're taking it apart to remember where everything goes when it comes time to put it back on your cart.

The plus side is you get the parts to convert yours AND hopefully some parts to sell off to help recover the purchase price.

The negative side is you have to have the room to do all this without people yelling at you about it.

-Scott H.

[wildandwonderfulprod]

I've been trying to find a good parts cart to do the same with my 93 DS resistor coil cart. Trouble is, every cart I find is a regen cart and not a series! I know the F/R switch is different between regen and series but other than that, is there anything that makes them a deal breaker for being a good parts cart to swap out with mine? I'm not going to swap the motor obviously but I want to convert to 48v so that's what i'm looking for in a parts cart.....

[wildandwonderfulprod]

Originally Posted by scottyb

If you have a row of coils behind the batteries then you have a 36v resistor coil cart. You should have six 6v batteries. They should all read above 6.0 volts on DMM, digital multi-meter.
It can be converted to modern Solid State speed control which will increase run time and allow you to put more voltage to your motor to turn those big tires you want.
The bad news is you better start winning every jackpot to pay for it

He's right! Its NOT CHEAP!!!!!!!!!

[scottyb]

You guys a kind of barking up the wrong tree on the stock cart parts..... a stock series cart runs 12-14 mph, you would have to upgrade all the components to run big tires and get good torque...

[shadowman]

yeah scotty is right if you just buy a cart with a stock controller setup you can change the cart to a controller cart but other than that you gain nothing.......a resistor cart and a stock controller cart go the same speed the only difference is your batteries may last a little longer................you need to upgrade from stock........................

[scottyb]

All of the stock Controllers are going to be in the 250-275 amp range with 50-75 amp solenoids.
What you guys need is an aftermarket controller with 4-500a capacity and a 2-400a solenoid....big difference in performance.