Repair manual
Troubleshooting – BlueCool Truck Electrical System
Webasto Product N.A., Inc. 24 www.techwebasto.com
™
Checking circulation pump circuit at control module
Figure 29. Control module output to circulation pump circuit checks (DC voltage)
V DC
V
V
Volts DC
_
+
1
2
34
5
6
7
8
1
2
3
4
5
6
7
8
Red 14GA - Constant Power Positive (Fused 10 amp.)
Brown 14GA - Constant Negative to all Components
Pink 16GA - 12V Positive Reference Signal to Control Module
Orange 14GA - 12V Switched Positive to Coolant Pump
Purple 16GA - 12V Switched Positive to Pressure Sensor (X6),
Ambient Thermostat (X7) and System Control Relay (X10)
Not Used
Black 20GA - Storage Core Digital Temperature Sensor
White 20GA - Storage Core Digital Temperature Sensor
Viewed from wire insertion side
LEGEND
X1
OFF
ON
ACC
Key Switch
Position