|
Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
|
Thread Tools | Display Modes |
03-25-2018, 10:06 AM | #1 |
Gone Wild
Join Date: Sep 2012
Posts: 245
|
TXT micro switch ITS or key switch problems
Hey, still trying to fix my EZGO TXT Series motor cart. From everything I keep reading, I feel like the problem may be micro or key switch or ITS. However, My solenoid clicks and pack voltage is on both sides of large terminals with big resistor removed when key on and pedal engaged. Small resistor gets pack voltage (or close) on red side when key on and pedal engaged, black side does not get negative voltage.
Micro switch has 1.9v at the switch side (against the plunger rod) but there are not volts on either terminal output (one red and one green wire I think) whether or not the switch is open or closed. Haven't checked continuity. It has a 450 amp Alltrax AXE7245. The light flashes green a few times and then stays green. Can press pedal all the way and it never turns to orange. The white wire (from the ITS and pedal box area) has no voltage at the controller. It has a F&R 400a reversing contactor and 400a main contactor. I really appreciate any help on this. thanks |
Today | |
Sponsored Links
__________________
This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum |
|
03-25-2018, 11:01 AM | #2 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
|
Re: TXT micro switch ITS or key switch problems
If the solenoid clicks, the keyswitch and pedal microswitch are okay.
If the LED flashes 4 times, it is programmed for an ITS type throttle. Any other number of flashes means it is programmed for a different type throttle and won't work with the ITS throttle system in your cart. Measure the voltage between the white and black wires to the ITS sensor in the pedal box, with the wires connected to the controller. When pedal is pushed just far enough to make solenoid click, you should read 10V and when pedal is on floor it should be 6V. Also, measure between the B- and M- terminals on the AXE. When the pedal is pushed just far enough for solenoid to click, you ought to get full battery pack voltage and the voltage ought tpo decrease to zero when pedal is on floor. |
03-25-2018, 03:24 PM | #3 |
Gone Wild
Join Date: Sep 2012
Posts: 245
|
Re: TXT micro switch ITS or key switch problems
When I went to run those tests, the cart worked. When it first became a problem, it was intermittent for a few times before it finally was not working. It hasn't worked for the past couple weeks of me trying to diagnose the problem. Since it is working now, I will have to wait until it isn't to start running diagnostics again. I'm leaving it on jack stands for now. Any advice on things to check would still be appreciated. Thanks
|
03-25-2018, 03:59 PM | #4 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
|
Re: TXT micro switch ITS or key switch problems
Intermittent problems are difficult to find since you can only troubleshoot when they exist.
Troubleshooting a DC series drive is fairly straightforward and relatively simple. If the solenoid clicks, the problem is in the high current circuit. If it doesn't, the problem is in the solenoid activation circuit. You said your solenoid clicks, so you have a problem in the high current circuit. First step is to measure the battery pack voltage. It should be close to fully charged for troubleshooting. Next Measure the voltage between B- and M-. It should be the same as the pack voltage you just measured. If it is, press the pedal to the floor and the voltage ought to decrease to zero. If it doesn't, the problem is in the controller or throttle. If it does, the problem is in the motor circuit. If the voltage between B- and M- is zero or significantly less than the battery pack voltage, the problem is in the high current cables and contacts between the battery pack and the controller. For series drives, the F/R switch is the primary suspect. -------- In and of themselves, those three basic steps (Pack voltage, solenoid click and voltage between B- & M-) are not intended to identify the problem, they only point to where to further troubleshooting is needed to find the problem. |
03-25-2018, 06:03 PM | #5 |
Gone Wild
Join Date: Sep 2012
Posts: 245
|
Re: TXT micro switch ITS or key switch problems
Thanks for all the info. So, the F&R switch is part of the high current circuit? This cart is a series cart, but it has a rocker F/R switch on the dash (custom deal professionally done). Should I pop that switch out and test it next time cart stops working? Thanks again, really really appreciated.
|
03-25-2018, 06:38 PM | #6 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
|
Re: TXT micro switch ITS or key switch problems
Quote:
You can check the operation of the dash mounted rocker switch by ear. When you go from neutral to F or R, you should hear the solenoids click. (Contactor is actually the proper name for a high current relay - solenoid is only the electromagnet part of it) |
|
03-25-2018, 07:57 PM | #7 |
Gone Wild
Join Date: Sep 2012
Posts: 245
|
Re: TXT micro switch ITS or key switch problems
Oh ok, thanks again
|
04-07-2018, 08:41 AM | #8 |
Gone Wild
Join Date: Sep 2012
Posts: 245
|
Re: TXT micro switch ITS or key switch problems
Update, I tested the B- and M- on the controller and did not show any volts. So now I will turn my attention to the reversing contactor. How can I test that it works? Keep in mind, it was working fine and no cables or wiring have been changed. Thanks so much
|
04-07-2018, 08:45 AM | #9 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,356
|
Re: TXT micro switch ITS or key switch problems
It sounds like the controller may not have (+)power to it's control circuit or at B+ and B-.
1. Is the LED status light on? 2. is there battery pack voltage between controller B+ and B- when the solenoid clicks (remove resistor for this test) 3. Does status light turn orange at full throttle? 4. what is the voltage between M- and B- when the solenoid clicks and the pedal is depressed? Reversing contactor test attached |
04-07-2018, 08:52 AM | #10 |
Gone Wild
Join Date: Sep 2012
Posts: 245
|
Re: TXT micro switch ITS or key switch problems
B+ has pack voltage (pos lead on controller B+, neg lead on battery pack neg). M- has almost half battery pack voltage tested same way. B- has 0v tested same way
|
|
Thread Tools | |
Display Modes | |
|
Similar Threads | ||||
Thread | Forum | |||
Series F/R switch micro switch wiring? | Electric EZGO | |||
Micro Switch issue or F & R switch. | Electric EZGO | |||
Micro switch on fwd and rev switch has bee removed | Electric EZGO | |||
micro switch | Electric EZGO |