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Old 07-14-2012, 11:17 AM   #1
donhorn83
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Default 1997 TXT wont run

Hello,

Hoping someone here can give me a hand as I am having problems with my 1997 EZ GO TXT standard.

A few days ago, I noticed that my golf cart was acting funny. I would push the gas pedal down and it wouldnt go anywhere. After about 5-10 seconds of pushing the gas pedal, it would finally go. As long as I had the gas pedal pushed in it would work fine. As soon as I would take my foot off the gas pedal, it would do the same thing again. It is finally to the point to where it wont go at all. Ive checked all battery cables, checked the voltage, and looked for any broken wires. I cant seem to find the problem, I thought it was just a short. I jacked up the golf cart and looked at the gas pedal cable and it looks to be in good shape. Also, you can here the solenoid click in when you push the gas pedal, it just wont run. Any ideas?
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Old 07-14-2012, 11:30 AM   #2
LostHusker
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Default Re: 1997 TXT wont run

Lets confirm which drive system you have, you have a toggle switch on top of the controller box? If so you have a DCS, if you don't then it is a series.
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Old 07-14-2012, 11:41 AM   #3
donhorn83
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Default Re: 1997 TXT wont run

It is a series.
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Old 07-14-2012, 12:12 PM   #4
JohnnieB
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Default Re: 1997 TXT wont run

Sounds like a gummed up microswitch in the throttle box, but you say the solenoid is clicking when you press the pedal, so let's start with the basics.

What is the battery pack voltage at rest? (38.2V is full charge)
What is the battery pack voltage when cart is misbehaving? (Still 38V or higher?)

Lift rear wheels off ground, so cart won't run over or into anything.
Attach Black DVM lead to B- on controller.
Attach Red DVM lead to M- on controller.
Key = ON
F/R = F or R
Press pedal until solenoid first clicks.
Voltage should be 38.2V or whatever pack is charged to.
If not, troubleshoot high current cables and connections.
Press pedal to floor slowly.
Voltage should gradually reduce to zero or near zero. (<0.5V)
If not, controller is bad or throttle input to controller is bad.

Let us know what you get.
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Old 07-14-2012, 12:34 PM   #5
donhorn83
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Default Re: 1997 TXT wont run

Quote:
Originally Posted by JohnnieB View Post
Sounds like a gummed up microswitch in the throttle box, but you say the solenoid is clicking when you press the pedal, so let's start with the basics.

What is the battery pack voltage at rest? (38.2V is full charge)
What is the battery pack voltage when cart is misbehaving? (Still 38V or higher?)

Lift rear wheels off ground, so cart won't run over or into anything.
Attach Black DVM lead to B- on controller.
Attach Red DVM lead to M- on controller.
Key = ON
F/R = F or R
Press pedal until solenoid first clicks.
Voltage should be 38.2V or whatever pack is charged to.
If not, troubleshoot high current cables and connections.
Press pedal to floor slowly.
Voltage should gradually reduce to zero or near zero. (<0.5V)
If not, controller is bad or throttle input to controller is bad.

Let us know what you get.

Sorry Johnnie, Im pretty new to golf carts.....Where is the controller located?
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Old 07-14-2012, 01:40 PM   #6
JohnnieB
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Default Re: 1997 TXT wont run

Be careful. Wear eye and skin protection whenever working under the seat.
The batteries are capable of arc welding and they out-gas hydrogen and oxygen while charging, so a spark might set off an explosion.


Under seat, Passenger side, under the black plastic environmental cover.
Four bolts hold cover on, two visible on top, two hidden on bottom.
If it has never been off before, it'll be stuck in place, so you'll have to pry gently around the edges.

This is about what you'll see when you get the cover off. B- and M- should be in raised letters next to two of the big terminals. (Top right two IIRC)

(Thanks for the picture Dela )
Attached Images
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Old 07-14-2012, 03:41 PM   #7
scottyb
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Default Re: 1997 TXT wont run

Intermittent elec problems are sometimes the hardest to solve.
Do you mean to say each time you pres the gas the solenoid click but the cart only runs one out 10 times (random number for example)?
If so you could be dealing with worn Solenoid contacts and a new solenoid will fix the problem. A simple test with the DMM will tell the tale but, you have to remove the resistor to get proper readings.
Basically check for 36v and out on the large terminals when the solenoid clicks.
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Old 07-14-2012, 03:46 PM   #8
donhorn83
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Default Re: 1997 TXT wont run

Quote:
Originally Posted by JohnnieB View Post
Be careful. Wear eye and skin protection whenever working under the seat.
The batteries are capable of arc welding and they out-gas hydrogen and oxygen while charging, so a spark might set off an explosion.


Under seat, Passenger side, under the black plastic environmental cover.
Four bolts hold cover on, two visible on top, two hidden on bottom.
If it has never been off before, it'll be stuck in place, so you'll have to pry gently around the edges.

This is about what you'll see when you get the cover off. B- and M- should be in raised letters next to two of the big terminals. (Top right two IIRC)

(Thanks for the picture Dela )
Thanks Johnnie,

When I connect black dvm to b- and red dvm to m- I get a reading of 37.8v

When I press the pedal down....the voltage does not change.
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Old 07-14-2012, 03:51 PM   #9
donhorn83
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Default Re: 1997 TXT wont run

Quote:
Originally Posted by scottyb View Post
Intermittent elec problems are sometimes the hardest to solve.
Do you mean to say each time you pres the gas the solenoid click but the cart only runs one out 10 times (random number for example)?
If so you could be dealing with worn Solenoid contacts and a new solenoid will fix the problem. A simple test with the DMM will tell the tale but, you have to remove the resistor to get proper readings.
Basically check for 36v and out on the large terminals when the solenoid clicks.
When I first started having problems with it.... I would push the gas pedal in and nothing would happen. After holding the gas pedal down for a few seconds (random... sometimes 2-3 seconds or 10-15 seconds) it would start moving. And as long as I kept the gas pedal down, it would continue to go. If I take my foot completely off the gas, the entire process would start again. Now .... it just wont go at all.
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Old 07-14-2012, 03:53 PM   #10
scottyb
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Default Re: 1997 TXT wont run

Quote:
Originally Posted by donhorn83 View Post
Thanks Johnnie,

When I connect black dvm to b- and red dvm to m- I get a reading of 37.8v

When I press the pedal down....the voltage does not change.

Check the throttle input at the controller, probe the white wire with the + test lead and connect the - lead to the battery main -.
Key on, select forward. Meter should read 1v +/-.3v when the solenoid clicks and 2.7 +/- .5v when the peddle is depressed.

If the throttle input is close to these numbers it passes the test and the controller must be replaced.
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