Battery
+
-
Fuse
12 vdc = 25 amp
24 vdc = 15 amp
Ignition
Switch
Racor
Fuel
Heater
Racor 3-wire Heater
Connection Diagram
Racor ‘3-wire’ fuel heaters have polarity!
Red wire is for hot (+)
Black wire is for ground (-) and
White activates the power relay.
30
86
87
85
black 14
Green 14
red 14
white 18
Optional
Toggle
Switch
Schematic B - For Light Duty Power Relay Kits: RK 11861 and RK 11862
Battery
+
-
Ground
Ignition
Switch
Fuse Box
Rocker
Switch*
Detachable
Connector
Racor 2-wire Heater
Connection Diagram
Schematic C - For Heavy Duty Power Relay Kits: RK 19490-12 and RK 19490-24
Red 18
YLW 18 (2)
Fuse Location
60 amp
Red 10
Black 18
1A Min.
Red 18
Black 14
+
+
+
-
White 18
Fuse Box
1A Min.
Alternator:
Positive (+)
Output Terminal
Racor
Fuel
Heater
Red 10
Black 10
