Electrical Component and Inline Harness Connector End Views
7-53
X61A Junction Block - Instrument Panel X2
Pin
Size
Color
Circuit
Function
Terminal
Type ID
Option
1 - 2
—
—
—
Not Occupied
—
—
3
2
RD/GY
1342
Primary Fused Battery Positive Voltage 13
III
—
4
0.35
D-BU
2307
Passenger Air Bag On Indicator Control
II
—
5
—
—
—
Not Occupied
—
—
6
0.5
WH
2501
High Speed GMLAN Serial Data [-] 1
II
—
7
0.5
D-BU
2500
High Speed GMLAN Serial Data [+] 1
II
—
8 - 14
—
—
—
Not Occupied
—
—
15
0.5
L-GN/WH
24
Backup Lamp Control
II
—
16 - 17
—
—
—
Not Occupied
—
—
18
4
BK
550
Ground 5
V
—
19
0.35
VT/WH
5234
Passenger Seat Belt Indicator Control
II
—
20 - 22
—
—
—
Not Occupied
—
—
23
0.5
0.75
WH/BN
WH/BN
6815
6815
Inadvertent Load Control
Inadvertent Load Control
II
II
—
—
24
0.35
L-GN
2308
Passenger Air Bag Off Indicator Control
II
—
25
—
—
—
Not Occupied
—
—
26
0.35
D-BU/GY
7473
Incremental Encoder Impulse Signal
II
—
27
0.35
VT
7476
Incremental Encoder Sensor Low Reference
II
—
28
—
—
—
Not Occupied
—
—
29
0.75
GY
157
Interior Lamp Control
II
—
30
0.35
GY
156
Courtesy Lamp Switch Signal
II
—
31
1
YE/VT
1553
Transfer Case Motor Counter Clockwise Control
IV
—
32
0.35
YE
7474
Incremental Encoder Direction Signal
II
—
33
0.75
VT/GY
1054
Stop Lamp Control 2
IV
—
34
—
—
—
Not Occupied
—
—
35
2.5
RD/L-GN
242
Primary Fused Battery Positive Voltage 2
III
—
36
0.35
WH/L-GN
7475
Incremental Encoder Sensor 8V Reference
II
—
37
—
—
—
Not Occupied
—
—
38
0.35
VT/YE
5985
Accessory Wake-Up Serial Data
II
—
39 - 43
—
—
—
Not Occupied
—
—
44
0.5
WH/D-BU
3691
Trailer Brake Apply Signal
II
—
45
—
—
—
Not Occupied
—
—
46
1
YE/GY
1552
Transfer Case Motor Clockwise Control
IV
—
47
0.5
L-GN/GY
817
Vehicle Speed Signal 4
II
—
48
2.5
D-BU
47
Trailer Auxiliary Control
III
—
49
—
—
—
Not Occupied
—
—
50
0.35
VT/YE
43
Accessory Voltage 0
I
—
2021 - Silverado 4500HD, 5500HD, and 6500HD Electrical Body Builder Manual