TEST OR INSPECTION
Put cab FOAM SYSTEM switch to off position (WP 0004). Reconnect air line at roof
turret foam A multi-metering valve cylinder. Disconnect valve control wire harness roof
turret foam A multi-metering connector. Put cab FOAM SYSTEM switch to on position
set, check for 22 to 28 VDC between valve control wire harness wire 4055 (purple) at
ROOF TURRET FOAM A foam system flow control manifold connector, terminal 1, and
a known good ground.
If 22 to 28 VDC are not present, repair wire 4055 (purple) in valve control
wire harness if repairable (TM 9-2320-325-14&P), or replace valve control
wire harness (WP 0463).