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LOW COOLANT PROBE
(RADIATOR)
TELL-TALE PANEL
ENGINE WATER
INSTRUMENT CLUSTER GROUND
"ENGINE WATER"
(LOW COOLANT)
MODULE
SYSTEM OPERATION: The Engine Water (Low Coolant) indicator
system is a D. C . powered, transistorized circuit utilizing a stain-
less steel probe to sense the presence of coolant in the Motorhome
cooling system . When coolant level in radiator is satisfactory, the
16/Yellow wire is grounded through the radiator probe. When fluid
level in the radiator drops below the probe, probe resistance in-
creases . If probe resistance is high enough to trigger the inte-
grated circuit of the module, a ground path is provided for the tell-
tale panel, turning the "ENGINE WATER" light on .
A-6168
in tell-tale panel .
If bulb does not light, then
problem is in low coolant module or tell-tale
printed circuit board.
See tell-tale printed
INSTRUMENT PANEL WIRING
Wiring to the instrument panel in late model
The two air-tone "S" type vibrating electric
horns in late '76 model vehicles are mounted
Figure 5-Engine Water (Low Coolant) Schematic
WIRING
HORN
CHASSIS ELECTRICAL 12-3
circuit check procedure or "Coolant Level
Indicator Diagnosis" chart, Sec. 12, Main-
tenance Manual X-7525 .
'76 vehicles has been revised .
Refer to figure
4
for
panel
wiring
and . proper connector
locations .
typically
as
shown in figure 6 (behind the left
front access door).
The electric air-tone "S"
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