Hummer H1 (2006+). Manual — part 335
12-16
Electrical System
_______________________________________________________
FUSE/RELAY LOCATION AND IDENTIFICATION
Interior Fuse Box
The interior fuse box, is located under the instrument panel to the left of the steering column. The fuse box is divided into two mini-
fuse junction blocks, relays, and a auxiliary power point.The mini-fuse blocks may be accessed without removing the main fuse
box cover (Figure 12-17).
To access relays, the main fuse box cover must be removed. Before removing any of the fuse box access covers, refer to the illus-
trations and charts in this section for the location of specific fuses, relays, and circuit breakers. Doing this will enable you to go di-
rectly to the fuse or circuit breaker you want to inspect.
Figure 12-17: Interior Fuse Box and Mini Fuse Layout
Fuses and circuit breakers protect the vehicle's electrical system from damage caused by overloading. An overloaded circuit
breaker will switch the circuit on again, causing intermittent operation. A blown fuse will permanently disable the circuit until the
fuse is replaced.
Whenever a fuse blows or a circuit breaker opens a circuit, all electrical components using that circuit will not operate. Therefore,
during diagnosis of any of these electrical components, check the appropriate fuses and circuit breakers for damage (Figure 12-20).
In Line Fuses
Some fuses are placed in-line with the components they are protecting, meaning they are not located in the fuse box but in the ac-
tual wire suppling current to the device. The only inline fuse used on the HUMMER H1 is in the power feed to the HVAC high
blower relay. This fuse is located on the passenger side of the engine compartment inside a black plastic cover.
Auxiliary Power Point
An auxiliary power point is provided to ease installation of aftermarket electrical accessories. The power point is divided into 2
sections: Ignition and Battery. When a power supply is needed, a fuse must be installed into one of the empty slots, and a connec-
CTIS BUZZER
FLASHER
H
G
F
E
D
C
B
A
UPPER
LOWER
BLOCK
MINI-FUSE
MINI-FUSE
BLOCK
INTERIOR FUSE BOX
7-OM5-001.1
1
2
3
4
5
6
7
5
5
5
5
5
5
5
–
7.5
5
5
20
5
5
5
10
7.5
10
–
20
30
15
5
20
15
15
30
25
5
–
7.5
–
15
7.5
5
5
5
7.5
7.5
15
5
5
5
5
30
7.5
–
–
25
5
10
20
30
15
15
25
______________________________________________________
Electrical System 12-17
tion made to the adjacent terminal. The main supply circuits to both sections of the aux. power point are fused to 30 amps. Total
amperage draw on either section should not exceed 30 amps.
Figure 12-18: Auxiliary Power Point
Figure 12-19: Relay Location (Interior Fuse Box)
IGNITION
BATTERY
FUSE SLOT
TERMINAL
12-18
Electrical System
_______________________________________________________
UPPER MINI-FUSE LOCATION
*May not be provided.
FUSE
AMPERAGE
CIRCUIT PROTECTED
1E
5
Spare Fuse
2E
–
Blank
3E
7.5
Spare Fuse
4E
–
Blank
5E
15
Spare Fuse
6E
7.5
IGN Interlock Solenoid
7E
5
Aux Water Pump
1F
5
Running Lights
2F
5
Panel Lights Dimmer
3F
7.5
Front Parking/Running Lights
4F
7.5
Rear Parking/Running Lights
5F
15
Trailer Park Lights
6F
5
Underhood and Trouble Lights
7F
5
Warning Chimes
1G
5
CTIS/Key Chime
2G
5
Power Windows
3G
30
Auxiliary Power Point (Ignition)
4G
7.5
Radio Ignition
5G
–
Blank
6G
–
Blank
7G
25
Windshield Wiper/Washer
1H
5
ALDL RKE
2H
10
Radio Memory/Clock
3H
20
Power Door Locks/Power Mirror
4H
30
Auxiliary Power Point (Battery)
5H
15
Dome/Courtesy Lights
6H
15
Auxiliary Power Outlet (console)
7H
25*
Trailer Brake Controller
______________________________________________________
Electrical System 12-19
LOWER MINI-FUSE LOCATION
FUSE
AMPERAGE
CIRCUIT PROTECTED
1A
5
Spare Fuse
2A
5
Brake Switch
3A
5
Cruise Control
4A
5
Trans Switches
5A
5
HVAC Pump
6A
5
Aux Water Pump
7A
5
ECM Relay
1B
–
Blank
2B
7.5
Brake Interlock
3B
5
Fuel Tank Selector Switch
4B
5
Gauges/Indicator Lights/MIL
5B
20
Heated Seats
6B
5
E Locker
7B
5
Remote Entry Ignition Feed
1C
5
Transmission Shifter Lock/Heated Windshield
2C
10
A/C Clutch Relay And Compass
3C
7.5
Backup Lights
4C
10
Turn Signals
5C
–
Blank
6C
20
HVAC Control
7C
30
HVAC Blower
1D
15
Radio Amplifier-Monsoon only
2D
5
Compass Mirror
3D
20
Cigar Lighters
4D
15
Stoplights
5D
15
Hazard Flasher
6D
30
E Locker
7D
25
Anti-lock Brakes
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