Taylor-Dunn C0-425-36 Operation, Troubleshooting And Replacement Parts Manualooting And Replacement Parts Manual page 161

TEST 1.7:
Depress the accelerator pedal to engage FS-1 only (creep
speed).
Perform the following tests:
Test the voltage at pin #10 on the 12-pin logic card
connector.
If the voltage is below 0.3 volts, then skip ahead
to test #1.8.
If the voltage is above 0.3 volts, then skip ahead to
Test #6.
TEST 1.8:
Test the voltage at pin #4 on the 12-pin logic card
connector.
If the voltage is low, then skip ahead to test #1.9.
If the voltage is high, then skip ahead to Test #6.
TEST 1.9:
Depress the accelerator pedal fully.
Test the voltage at pin #10 on the 12-pin logic card
connector.
If the voltage is between 4.8 and 5.1 volts, then skip
ahead to Test #2.
If the voltage is not between 4.8 and 5.1 volts, then
skip ahead to Test #6.
Electrical Troubleshooting
Troubleshooting Page 7