Kohler — Battery Equalizer Troubleshooting
Testing & diagnosis
From a Kohler service manual covering: 125REOZJG, 150 REOZJ4, 150REZG, 175REOZT4, 2000REOZM, 2000REOZMD, 2250REOZDD, 275REOZJD, 275REOZJE, 400REZX, 400RZX, 48REOZK4…. Check it applies to your exact model before use.
Applies to: Kohler 125REOZJG, Kohler 150 REOZJ4, Kohler 150REZG, Kohler 175REOZT4, Kohler 2000REOZM, Kohler 2000REOZMD, Kohler 2250REOZDD, Kohler 275REOZJD, Kohler 275REOZJE, Kohler 400REZX, Kohler 400RZX, Kohler 48REOZK4
Before you start
- To prevent reverse polarity damage to the battery equalizer, remove the ground (GND) connection first and attach the ground connection last when disconnecting the battery equalizer.
Procedure
- Remove the ground (GND) connections from the battery equalizer; do not allow contact with other connections.
- Verify a differential of 12 volts between the +12 volt and +24 volt terminals using a 12-volt test light; the light will illuminate on a functional unit. Remove the test light.
- Connect the test light between the +12 volt and GND terminals; the light will illuminate on a functional unit.
- With the test light connected, measure and record the voltage between the +12 volt and +24 volt terminals.
- With the test light connected, measure and record the voltage between the +12 volt and GND terminals.
- Remove the test light.
- Compare the values from steps 4 and 5; the difference should be - 0.5 and +0.13 volts on a functional unit.
Tools required
- 12-volt test light with alligator clips Amazon
- Voltmeter with 0.01 volt resolution Amazon
- Battery load tester Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Difference should be - 0.5 and +0.13 volts
Full service-parts list: Kohler 125REOZJG →, Kohler 150 REOZJ4 →, Kohler 175REOZT4 →, Kohler 2000REOZM →, Kohler 2000REOZMD →, Kohler 2250REOZDD →, Kohler 275REOZJD →, Kohler 275REOZJE →, Kohler 48REOZK4 →
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.