If Your controller number is what you posted earlier :
60L700NNVSS2 than it is a Series controller (previous FNR test is not applicable) and it uses a 3-wire Voltage throttle and not a 2-wire 5k-0 rheostat throttle.
The Correct voltage on pin #3 should be less than
0.3v with pedal
Up and more than
4.65v with pedal all the way
Down.
Just pull the terminal wire from #3 enough that you can put the meter probe on the terminal but leave the throttle wire connected.
The above voltage is for the FNR in Forward.
Repeat the test with the FNR in Reverse.
If Your cart has reduced reverse speed, there will be a resistor added to the throttle circuit by a micro-switch that is activated when the FNR is in the Reverse position.
In this case the voltage in Reverse will still start under 0.3v but the max voltage with pedal all the way down will be less than 3v.
The best way to test the Controller output which takes in consideration: Main Solenoid, FNR switch, all high current cables and both Motor windings is:
Raise one of the rear wheels off the ground (or both if limited slip differential).
Put the FNR in Forward
Set the meter to DC 200v
Place meter positive probe on Controller M-
Place meter negative probe on Controller B-
The voltage should be a little less than pack voltage with pedal UP (pre-charge resistor causes a voltage drop).
Press the pedal a little until the Solenoid closes, the voltage will rise to pack voltage since the Solenoid contacts will by-pass the pre-charge resistor.
Continue to press the pedal and the voltage should drop, when the pedal is all the way down the voltage should be 0v.
Repeat the test above with the FNR in Reverse.
If You don't get those results, please post the actual reading you got as that will point to where the failure is occurring.