Electrical System; Control Unit - Husqvarna 520iHT4 Workshop Manual

5.4 Electrical system

5.4.1 Electrical diagram
Trigger
1 2 3 4 5 6
1 2 3 4 5 6
3 1
4
6
X2
Cable side

5.5 Control unit

5.5.1 To remove and install the control unit
1. Loosen the power trigger guard and remove the
wear guard. Refer to
power trigger guard and the wear guard on page 13 .
2. Disassemble the control handle. Refer to
disassemble and assemble the control handle on
page 13 .
3. Remove the power trigger lockout and power trigger.
To remove and install the power trigger
Refer to
lockout and power trigger on page 13 .
4. Disconnect the main switch. Refer to
install the main switch on page 14 .
5. Remove the right half of the battery housing. Refer
To disassemble and assemble the battery
to
housing on page 14 .
1235 - 001 -
Black
1
Black
2
Black
3
Black
4
Black
5
Black
6
Black
7
Black
8
Black
9
Black
10
X13
To remove and install the
To
To remove and
X19
Green
2 2
Green
1 1
Black
1
2
Black
3
4
Black
5
6
Black
7
8
Black
9
10
Black
11
12
Black
13
Red
14
Black
15
Blue
16
Black
17
Gray
18
Black
19
Yellow
20
21
Green
22
23
24
25
26
2
1
26
X1
Cable side
6. Remove the 2 screws (A) to the control unit and the
2 screws (B) to the battery connector.
Yellow
Black
Green
Black
Red
A B C
A B
C
B
Repair instructions - 15
Motor
A