Assuming it's an ehydro, is the flasher light blinking any codes?
During normal operation the status indicator light (A) will
illuminated for approximately 4 seconds when the key is
turned on as part of a self test, then the light will not be
illuminated. The status indicator light will begin to flash a
specific fault code when an operational command input is
given and any one or more parts of that circuit are not
operating properly.
The status indicator light will begin to flash a fault code that
will help identify the problem. If more than one fault exists
each fault will be displayed before the controller repeats the
fault codes. If for example, the controller reads a fault on
both forward and reverse pedals, the controller will flash the
forward fault code then the reverse fault code and then it
will repeat the cycle.
Each fault will have to be corrected and clear one by one
should there be multiple faults.
When the first fault has been cleared, the electronic
operating system will reset. When the vehicle is operated
the electronic operating system will flash the next fault code
that is recorded if there are any problems that still exist.
The electronic operating system has 12 different fault
codes available to assist with diagnostics. Each fault code
is a combination of four long and/or short flashes.
A fault code of 2 long and 2 short flashes (example shown)
would be signaling that the reverse pedal potentiometer is
malfunctioning or is out of calibration.
When the reverse potentiometer is recalibrated, adjusted,
or replaced, the electronic operating system would reset,
clearing the fault code and resuming normal operation.
This code would flash two long flashes followed by two
short flashes followed by an off period. This sequence
would then repeat itself until the correction is made and
power to the controller cycled off and back on.
The long flash is approximately 1.0 second, the short flash
is approximately 0.5 second and the off period is
approximately 4 seconds. The flash code begins after the
off period. Whenever reading a fault flash code be sure to
let the code cycle several times while reading the code to
be sure you are at the beginning of the code.
Once a code has been read, it can be matched to the fault
code chart to explain what the electronic operating system
is reading as a problem and what corrective action is
needed to positively identify and correct the source of the
fault.