Hi, Hyster J30XMT2 with GE SX controls. 9.30V to battery case from positive cable. Code 27, 65, 66, different code with each key-on and no fwd/rev/lift/tilt. Removed battery and reconnected with tagline, no codes, runs as normal.
Have heard of voltage leakage and promptly thoroughly washed battery with neutralizer and let dry over weekend, now leakage is 16V to case. Checked all other batteries in the shop, all have leakage to case. Removed ballast plate from truck and thoroughly washed conduit channels, cables and wires under battery look fine now; no continuity to frame but with battery case leakage, might as well be?
Is this normal? How do you correct it? Will a cap between keyon + and frame do any good, or am I leaking to frame elsewhere?
Thanks
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voltage is not a good test.it only tells you what cell has the greatest leakage to the frame, not how much the leakage is.
check ohms to frame, fix anyplace, battery included, that has less than 100k ohms between any power cables and frame.
sounds to me like you may have to get the battery fixed, a cell or 3 replaced.
code 27 says voltage to logic circuit less than 10 volts,
65 is contactor coil current of line contactor too high.
66 is field current above transistor for current limit.
one thing I know about 66 codes is that they can be generated (induced) if the control wiring runs too close physically to the motor power cables, and is made worse by a failing battery. I have also seen these codes in a truck that the wrong style of horn was installed and the horn generated all sorts of RF and voltage spike noise in the control circuits.
but the "runs fine with battery removed" is a dead [battery] give away.
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