Product Manual

RD12A/12K Schematics—RD12A (Gasoline)
wc_tx003846gb_FM10.fm
131
16.4 Electrical Schematic Components
Ref. Description Ref. Description
1 Engine stop 18 Strobe light (optional)
2 Throttle switch 19 Seat switch
3 Key switch 20 Water switch
4 Hourmeter 21 Vibration switch
5 Work lights switch (optional) 22 Neutral switch
6 Rear work lights (optional) 23 Reverse switch
7 Left work light (optional) 24 Neutral / reverse switch operation
8 Right work light (optional) Switches have LED on bottom to indicate when switch
is closed and sending B+
• Neutral switch (labled N.C.)
In neutral – switch senses metal so it is open
No B+ to relay
Switch LED off
In forward or reverse – switch does not sense metal so
it is closed
B+ sent to relay
Switch LED on
•Reverse switch (labeled N.O.) – cam on lever biased
toward rear
In neutral and forward – switch does not detect metal so
it is open
No B+ to relay
Switch LED off
In reverse – switch senses metal so it is closed
B+ to relay
Switch LED on
9 Low oil pressure indicator light – red
10 Water spray indicator light – green
11 Vibration indicator light – green
12 Pump timer module
1 – Switched power input
2 – Seat switch input
3 – Water spray ON-OFF input
4 – Vibration ON-OFF input
5 – Ground
6 – Neutral switch input
7 – Crank input
8 — 25 Alternator
9 — 26 Voltage regulator
10 – Pump output 27 Telematics connection
11 – Fuel 28 Fuel cutoff solenoid
12 – Water ON lamp output 29 Engine crank solenoid
13 – Glow plug output 30 Internal ground
14 – Vibration ON output 31 Starter
13 Backup alarm relay (optional) 32 Fuses
14 Backup alarm (optional) 15A – pump spray
15 Ground coil relay 15A – lights
16 Crank relay 20A – regulator
17 Neutral relay 20A – main
33 Battery 37 Front vibration solenoid
34 Engine ground 38 Throttle solenoid
35 Work light harness (optional) 39 Oil pressure switch
36 Spray bar pump — —
Ref. Description Ref. Description