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Fuse Block - Underhood X2

Fig 1: Fuse Block - Underhood X2
GM1835064Courtesy of GENERAL MOTORS CORP.
Fuse Block - Underhood X2 (LY7)

Pin Wire Circuit Function
1 3 L-BU 409 Cooling Fan Motor Supply Voltage
2 - - Not Used
3 0.5 D-BU 473 High Speed Cooling Fan Relay Control
4 - - Not Used
5 1 PK/BK 5291 Ignition 1 Voltage
6 0.5 RD/WH 40 Battery Positive Voltage
0.5 RD/WH 40 Battery Positive Voltage (LY7/LZ4)
7 0.5 D-GN 335 Low Speed Cooling Fan Relay Control
8 0.5 PK/BK 5293 Powertrain Main Relay Fused Supply (3)
0.5 PK/BK 5293 Powertrain Main Relay Fused Supply (3) (LY7)
9 0.5 PK/BK 5293 Powertrain Main Relay Fused Supply (3)
10 - - Not Used
11 1 PK/BK 5292 Ignition 1 Voltage (LY7)
12 1 PK/BK 5292 Ignition 1 Voltage (LY7)
13 1 PK/BK 5291 Ignition 1 Voltage
14 1 PK/BK 5291 Ignition 1 Voltage (LY7)
15 0.5 RD/WH 40 Battery Positive Voltage
16 - - Not Used
17 0.8 PK/BK 6341 Powertrain Relay Contact Signal
18 0.8 PK/BK 5293 Powertrain Main Relay Fused Supply (3)
0.5 PK/BK 5293 Powertrain Main Relay Fused Supply (3) (LY7/LZ4)
19 - - Not Used
20 1 PK/BK 5292 Ignition 1 Voltage
21 1 PK/BK 5292 Ignition 1 Voltage (LE5/LY7)
22 0.5 PK/BK 5291 Ignition 1 Voltage (LY7)
23-24 - - Not Used
25 0.5 BN/WH 419 MIL Control
26 0.5 D-BU 5985 Accessory Wakeup Serial Data
0.35 D-BU 5985 Accessory Wakeup Serial Data
27 0.5 PK/BK 5293 Powertrain Main Relay Fused Supply (3) (LY7/LZ4)
28 - - Not Used
29 3 GY 532 Cooling Fan Motor Supply Voltage
30-34 - - Not Used
35 0.5 PK 639 Ignition 1 Voltage
36 0.5 WH 17 Stop Lamp Switch Signal or Stop Lamp Supply Voltage
0.5 WH 17 Stop Lamp Switch Signal or Stop Lamp Supply Voltage
37 0.5 YE 5991 Powertrain Relay Coil Control
38-40 - - Not Used
41 0.5 BK/WH 251 Ground
42 0.5 D-GN/WH 465 Fuel Pump Relay Control
43 - - Not Used
44 0.5 PK 639 Ignition 1 Voltage
45 0.5 PU/WH 6386 Starter Enable Relay (PPEI 3) Control
46 0.5 D-GN/WH 459 A/C Compressor Clutch Relay Control
47 3 WH 504 Cooling Fan Low Reference
48-49 - - Not Used
50 0.5 WH 1310 EVAP Canister Vent Solenoid Control
51 - - Not Used
52 0.5 D-GN 59 A/C Compressor Clutch Supply Voltage
53 0.5 PK 639 Run/Crank Ignition 1 Voltage (LE5)
54 0.5 BK/WH 251 Ground
55 - - Not Used
56 2 PU 6 Starter Solenoid Crank Voltage
Connector Part Information 
  • OEM: 13578267
  • Service: See Catalog
  • Description: 56-Way F Hybrid (BK)
Terminal Part Information 
  • Pins: 3, 5-9, 11-15, 17-18, 20-22, 25-27, 35-37, 41-42, 44-46, 50, 52, 54
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
  • Pins: 1, 29, 47
  • Terminal/Tray: 1241406-1/17
  • Core/Insulation Crimp: F/G
  • Release Tool/Test Probe: J-38125-557/J-35616-42 (RD)
  • Pins: 56
  • Terminal/Tray: 1241408-1/28
  • Core/Insulation Crimp: A/B
  • Release Tool/Test Probe: J-38125-557/J-35616-42 (RD)