TEST OR INSPECTION
If front tank or rear tank heater does not operate, but lights operate, go
to Step 20.
If front tank heater and light does not operate, go to Step 17.
If rear tank heater and light does not operate, go to Step 14.
If both front tank and rear tank heaters and lights do not operate, go to
Check if hydraulic generator digital display illuminates (WP 0004).
If hydraulic generator digital display does not illuminate, troubleshoot
Hydraulic Generator Does Not Operate Properly (WP 0171).
Shut hydraulic generator off (WP 0021). Shut off vehicle engine (TM 9-2320-347-10).
Open water tank heater control box (WP 0301). While an assistant puts TANK HEATER
TEST switch to test position (WP 0004), check for 22 to 28 VDC on orange wire at rear
water tank heater relay terminal.
If 22 to 28 VDC are not present, go to Step 12.