Taylor-Dunn B0-248-TT, Operation, T Roubleshooting And Replacement Parts Manual, Page: 146 / 204

Electrical Troubleshooting
Charger Troubleshooting Page 8
TROUBLESHOOTING FOR PORTABLE CHARGER
Disconnect the charger from the AC outlet and the batteries.
1. Test the voltage from the positive terminal on the vehicles DC receptacle to main
battery negative. This voltage should be equal to the battery voltage. If the voltage
is less than the battery voltage then this wire is broken or has a bad connection.
Stop here and repair the problem.
2. Test the voltage from the positive terminal on the DC receptacle to the negative
terminal on the DC receptacle. This voltage should be equal to the battery voltage.
If the voltage is less than the battery voltage, then the wire on the negative terminal
of the DC receptacle is broken or has a bad connection.
Stop here and repair the
problem.
Remove the charger cover and perform the following tests:
1. Inspect the internal wiring of the charger and repair as required.
2. Check the continuity of both fuse links and replace if bad.
3. Disconnect one lead from the capacitor. Test the capacitor using the capacitor
test function on the meter. If the capacitor is bad, it must be replaced. Stop here
and repair the problem.
4. Reconnect the lead to the capacitor and
disconnect one transformer lead from one of
the diodes. Test each of the diodes using the
diode test function on the meter. If either one of
the diodes are bad, replace the diode
assembly.
Stop here and repair the problem.
Fuse Links
Capacitor Test
HIGH VOLTAGE may be stored in the capacitor. Discharge the capacitor
before continuing. Connect a 2k ohm resistor across the capacitor
terminals for 10 seconds. Do not touch the capacitor terminals with
your hands. The resistor should be held with a pair of insulated pliers.
Failure to do so may cause serious bodily injury