MULTIQUIP DCA Series Service And Troubleshooting Manual page 65

ENGINE START (CRANK) RELAY
For use on DCA70, 150, 180, 220 and 300 generators
(John Deere Engines). See previous page for other model
genrators.
As shown in Figure 71, a typical starter solenoid has one
small terminal for the starter control wire and two large
terminals for the positive battery cable and the thick wire
that provides power to the starter motor. The B+ battery
terminal connects the solenoid directly to the positive
battery cable.
STARTER (CRANK) RELAY
DCA70, 150, 180, 220 and 300
TYPE GENERATORS
TO
STARTER
RED
SOLENOID B+
WHT.
TO ECU 845
PIN 5
TO CHASSIS
GND
GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23) — PAGE 65
ENGINE STARTER ( CRANK ) RELAY CON'T
TO
1
4
NO
STARTER
WHT.
SOLENOID
COIL 3
2
GRN. CHASSIS GND.
CATHODE ANODE
STARTER (CRANK)
RELAY
GRN.
3
(s)
4
WHT.
PIN 5
OUTPUT
SIGNAL
Figure 71. 4-Terminal Round Starter (Crank) Relay
The B+ battery voltage is also connected to the normally
open contact on the starter relay (terminal 4). When the
starter relay is energized at terminal 2 (coil) by the ECU
crank output signal (pin 5), this will cause the normally
open contacts (terminals 1 and 4) to close and the voltage is
sent via terminal 1 of the starter relay to the starter solenoid
(crank signal "S"). Terminal 3 on the starter relay is always
connected to chassis ground.
TO
1
(I)
WHT.
2
NEG.
POS.
RED
Y
E R
T T
B A
STARTER
SOLENOID
s
B+
STARTER
BLK.
TO CHASSIS
GND