1992 ez-go marathon wont go?

[MRTURBO]

Was doing ok last summer.Would charge and cycle on and off..Got like 15 mins run time.Checked some of the batteries and several was at 3 volts or less.
I removed all the trojan batteries and replaced them.Cleaned all terminals.
I do have my 36 volts in several locations.I verified the throttle resistance going to controller.
I anyone is familiar with the 92 any help or vital check points would greatly be appreciated.
At a full charge the cart will nudge forward about a quarter inch in either direction...
Thanks all!!!!!
Danny here in sunny myrtle beach S.C.

[JohnnieB]

What is the battery pack voltage? (Fully charged will be about 38.2V for a 36V pack)

Lift rear wheels off ground and put on jack stands.

Measure voltage between B- and M- terminals on controller when solenoid first clicks.
It should be FULL battery pack voltage.
If not, you have excessive resistance in a cable, connection or set of contacts in the high current loop.
(Here's a schematic with high current loop traced)

IF so, slowly press throttle pedal to floor.
Voltage should smoothly decrease to zero.


Let us know what you find.