IMT DA435HAR, User Manual, Page: 31 / 34

DA435HAR: 99900683: 6-7 19930125
FIGURE F-8. RELAY BOARD (77041378) WIRING INSTRUCTIONS
6-3. INSTALLATION
1. Locate an area in the engine compartment that
will both provide some protection against damage
and accessibility for wiring.
2. Provide adequate space between the mounting
surface and the back of the circuit board in order to
prevent electrical contact. Failure to do so will
cause erratic operation and/or circuit board failure.
3. Connect control wiring as indicated in Wiring
Chart.
4. Jumper wires connections:
4-1.Jumper wires must connect J to K, and L to M
for 12 volts excited systems. Remove the connecting
wires between I to J and M to N.
4-2.Jumper wires must connect I to J, and M to N
for ground excited systems*. Remove the connecting
wires between J to K and L to M.
WARNING
Failure to remove the extra connecting wire will cause the
relay board to fail. Check jumper wire connections of relay
board being replaced. (Most relay boards are wired as
stated in item 4-1.)
* NOTES
●
Circuits that could be ground excited are 6 - 10 & 11.
●
Quick Check: (Before connecting wires to circuit
board) Activate the engine stop switch from the crane. If
terminal 6 is hot, wire per 4-1. If not, wire per 4-2.
WIRING CHART
TERM WIRING CONNECTION
1 12-VOLT
2 POWER SWITCH FROM CRANE
3 GROUND
4 TO SPEED CONTROL
5 SPEED CONTROL FROM COMPRESSOR
6 ENGINE STOP FROM CRANE
7 FROM FUEL SOLENOID / DISTRIBUTOR GRD
8 TO FUEL SOLENOID / DISTRIBUTOR GRD
9 12-VOLT FROM IGNITION
10 SPEED CONTROL FROM CRANE
11 ENGINE START FROM CRANE
12 TO TRUCK STARTER
13 TO BRAKE SWITCH, CONTROLLED
14 TO PTO SWITCH, CONTROLLED
15 NC
16 NC
RELAY FUNCTION
A ON / OFF, POWER
B ISOLATION, SPEED CONTROL
C COMPRESSOR, SPEED CONTROL
D ENGINE STOP
E CRANE SPEED CONTROL
F ENGINE START
G BRAKE SWITCH, CONTROLLED
H PTO SWITCH