Model 4700 Maintenance Manual
Section 8. Theory of Operation
Single Traction Motor Trucks >S/N 10676
Pinout Matrix
Single Traction Motor Trucks >S/N 10676 Item
Connection
Function Description
Normal Level
Signal Source
Output to optional Mast Height switch (SW31). If not present, check wiring and connections.
B+
VM
SW31
Input to VM from optional Mast Height switch (SW31). If not present, check switch, wiring, and connections.
Switch closed: B+ open: 0V
SW31
VM
Theory of Operation
Signal User
1
JAM
NOT USED
2
JAP-1 thru 3
NOT USED
3
JAP-4
+V OUT
4
JAP-5
NOT USED
5
JAP-6
IN
6
JAP-7 thru 14
NOT USED
7
JAT-1 thru 3
NOT USED
8
JAT-4
+V OUT
+V Out to the configuration jumper(s) designating Model C60, EE, or both.
B+
VM
VM
9
JAT-5
CONF.
Input to VM (configuration jumper) for Model C60, standard and EE.
Open/+V Key if jumpered
VM
VM
10
JAT-6
CONF.
Input to VM (configuration jumper) for all EE models.
Open/+V Key if jumpered
VM
VM
11
JAT-7 thru 14
NOT USED
12
JBP-1
+V KEY
B+ from Key switch (SW1). If not present, check Key switch, wiring, and connections.
B+
SW1
PPA
13
JBP-2
+V COIL
Voltage from the PPA to CT2 coil (J50-5). If not present, check the PPA, wiring, and connections. Approx. 32 ohms across coil.
B+
PPA
CT2
14
JBP-3
NOT USED
15
JBP-4
SEAT
Input from the Seat switch (SW2). If not present, check seat switch, jumper, wiring, and connections.
B+
SW2
TPA, PPA
16
JBP-5
SAFETY/ AMPLIFIER ENABLE
B– from JBP-11 on the PPA. If voltage is >1V (wrt B–), check the jumper from JBP-11. If jumper is OK, check B– to the PPA.
Battery voltage wrt BT1+
PPA
PPA
17
JBP-6
NOT USED
18
JBP-7
+V OUT
Voltage to SW30 and SW2. If not present, check PPA, wiring, and connections.
B+
PPA
SW30, SW2
Publication 1160093, Issued: 20 May 2013
8-49
