Ground Points - Hummer H1 Service Manual

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Exterior Fuse Box
#1
40A
BLANK 10
BLANK 5
#2
20A CB
25 30
30A CB #3
20 30
#4
30A CB HORN
RELAY
30A CB #5
#6
30A
#7
40A
40A 30A
#8 #10
40A 30A
MAXI-FUSES
1
A
B
C
D
MINI-FUSE LAYOUT
Figure 12-21: Exterior Fuse Box
The exterior fuse box is located under the hood on the driver's
side of the engine compartment. The exterior fuse box houses
mini and maxi fuses, circuit breakers, and relays which supply
power to many of the electrical components in the engine com-
partment. The exterior fuse box can be accessed by first
removing the left side cowl cover then removing the fuse box
cover itself. Fuse and relay locations are labled on the inside of
the cover. Spare mini fuses are located in the exterior fuse box
for convient replacement. A fuse puller is also provided to ease
fuse removal.
FUSE AMPERAGE
1A –
2A 10
3A 20
1B –
2B 5
3B 20
1C 25
2C 30
3C –
1D 20
2D 30
3D –
Figure 12-22: Mini-Fuse Identification
(Exterior Fuse Box)
05745159
EXTERIOR
FUSE BOX
20
ABS
ABS
VALVE
WNG.
20
RELAY
RLY.
BLANK
BLANK
A/C FUEL HEATED
RELAY PUMP W/S
RELAY. RELAY
FUSE
5
PULLER
CTIS HEATED
#9
PUMP W/S
RELAY RELAY
9-OM5-004
2 3
CIRCUIT PROTECTED
Blank
PCM Ignition Feed
Engine Ignition Feed
Blank
ABS Controller
Engine Ignition Feed
ABS Valve Relay
Heated Windshield
Blank
Horn
Heated Windshield
Blank
Electrical System
Fuse/
Amperage
CB
1 40A
2 20A CB
3 30A CB
4 30A CB
5 30A CB
6 30A
7 40A
8 40A
9 30A
10 30A
Figure 12-23: Maxi-Fuse Identification (Exterior Fuse
Auxiliary Power Studs
The external fuse box provides 2 threaded studs for use as aux-
iliary power connections. Each stud is fused for up to 30 amps
with maxi-fuses located in the external fuse box. Both studs
provide battery power.
PWR STD A
PWR STD B
MAXI-FUSES
POWER STUD "A"
Figure 12-24: Auxiliary Power Studs

Ground Points

Two main grounding points are provided to ground vehicle
systems and add-on items. The main grounding stud is located
on the driver's side of the engine compartment next to the exte-
rior fuse box. The second grounding point is located to the left
of the instrument panel on the interior of the vehicle.
NOTE: Never drill holes in the body to ground electrical
items, the corrosion resistance is compromised, and bad
grounding could result.
12-13
Circuit Protected
Starter Circuit
Parking Lights
Headlights
Rear Defrost
Power Windows
CTIS Compressor
ABS/TT4 Hyd. Pump
Ignition Switch Batt Feed
Auxiliary power stud A
Auxiliary power stud B
Box)
EXTERNAL FUSE BOX
9-OM5-004
POWER STUD "B"
4-1-00