How It Works; Testing - Water Temperature Light; Testing - Glow Plug Light; Glow Plug Switch - Toro TX525 Service Manual

ELECTRICAL

How It Works

If the engine coolant gets too hot, the water temperature
light illuminates and an audible alarm sounds.
If the glow plugs are receiving power, the indicator light
illuminates.

Testing - Water Temperature Light

Disconnect the wire harness plug from the lights. Con-
nect 12v (+) to the "1A" terminal and connect ground
(-) to the "1B" terminal. If the light does not illuminate
replace the light assembly (Fig. 0811).
1B
2 B
1A-1B: Water Temperature Indicator Light
2A-2B: Glow Plug Indicator Light

Testing - Glow Plug Light

Connect 12v (+) to the "2A" terminal and connect ground
(-) to the "2B" terminal. If the light does not illuminate
replace the light assembly (Fig. 0811).
If indidcator lights test OK, check the circuit wiring,
Temperature Sender, Glow Plug Switch and Relay.
5-8
1A
2A
Fig 0811 PICT-5294a

Glow Plug Switch

Purpose

The glow plug switch activates the glow plug relay which
powers the glow plugs in addition to turning the glow
plug indicator light on.

Location

The glow plug switch is located in the center of the
control panel (Fig. 0812).
Rev. 000
Fig 0812 PICT-5301
TX525 Service Manual