FnR switch high pitch noise

[JohnnieB]

Originally Posted by fishb8

I have been through scottyb's directions before and always seem to get confused by the 1st part:

ITS - INDUCTIVE THROTTLE SENSOR

With the key switch ON - Forward direction selected - Push the Accelerator pedal just enough to activate the solenoid.
Install a "jumper wire" between the batteries BL+ post and the solenoid post with red wires attached.

Can anyone elaborate on this for me. what is the 1st sentence for? and what is BL+? I assume that it is the battery pack + terminal

It makes more sense when the word "OR" is inserted between the Blue and Red sentences.
The solenoid needs to be activated either by slightly pushing the pedal --- OR --- by installing the jumper wire.

Your assumption is correct. BL+ is hold-over from the Marathon days and earlier, when the battery pack was split, 3 batteries on the left side of cart and 3 on the right.

However, you cannot use that procedure to check the ITS on your cart since you do not have a stock series controller.

Connect your Negative test lead to Pin-2 and the Positive to Pin-3
When the pedal pushed until solenoid first clicks, you should have 10.0V
When pedal is on floor, you should have 6.0V
I don't have the allowable tolerances, but Alltrax ought to give them to you.

[fishb8]

Originally Posted by JohnnieB

If there is a Pre-Charge resistor across the solenoid terminals, that may account for measuring voltage between the M- and B+ terminals on the controller at all times. However, staying at 22.5V with pedal up and pedal down indicates the controller has had an internal melt down.

The LED not coming on at all is also a bad sign.
With the negative test lead attached to the B- on controller, measure the voltage at Pin-1 (with red wire still attached).
With key on, F or R selected and pedal down, it should read pack voltage.
If it does, the LED ought to be on.
If it doesn't, the controller is sick.

I'd call Alltrax at this point. They may have some more checks that can be performed, but I think the controller is bad.

I get 50.1 volts and the LED is off.

[fishb8]

Originally Posted by JohnnieB

It makes more sense when the word "OR" is inserted between the Blue and Red sentences.
The solenoid needs to be activated either by slightly pushing the pedal --- OR --- by installing the jumper wire.

Your assumption is correct. BL+ is hold-over from the Marathon days and earlier, when the battery pack was split, 3 batteries on the left side of cart and 3 on the right.

However, you cannot use that procedure to check the ITS on your cart since you do not have a stock series controller.

Connect your Negative test lead to Pin-2 and the Positive to Pin-3
When the pedal pushed until solenoid first clicks, you should have 10.0V
When pedal is on floor, you should have 6.0V
I don't have the allowable tolerances, but Alltrax ought to give them to you.

I get 0 volts at all times. click to full throttle.

[JohnnieB]

Controller is bad.

[fishb8]

Johnnie when I test between pin 2 and pin 3 should they be disconnected from the controller?
I did it both ways. disconnected was 0 volts. connected it was -2.5 volts.

**** this buggy has been nothing but trouble for me......

[JohnnieB]

Originally Posted by fishb8

Johnnie when I test between pin 2 and pin 3 should they be disconnected from the controller?
I did it both ways. disconnected was 0 volts. connected it was -2.5 volts.

**** this buggy has been nothing but trouble for me......

Wires connected.

[fishb8]

Thank you again for all your help.

I do have 1 more question(and I might start a new topic for this). I still have my old 36 volt controller, can I use it and just remove 2 batteries? The solenoid is upgraded, the FnR has been upgraded, resistor (400 amp, I think).

[JohnnieB]

The 48V solenoid might not work at 36V. Do you still have the original?
Also, the Pre-charge resistor for a 48V system is 470 Ohms, while it is 250 Ohms for a 36V system.

With the 22" tall tires, the cart's performance will be very modest with a stock (275A) controller, and I'm not sure how long it will last, but it should move the cart from Point-A to Point-B.

Be sure to keep the two batteries that were removed fully charged so they don't go bad.

[fishb8]

Thanks Johnnie. i will start a new topic about it. maybe someone knows about the solenoid

Thanks again for all the help.

[scottyb]

No need for a new thread, Just post what solenoid you have.