Chevrolet 2010 Impala Service Manual download pdf (Page 104)

REVISIONS MARKED IN BLUE 1/24/2011 2011 Chevrolet Municipal Vehicles Technical Manual

wIrINg DIagram – tahoE PPv aND 5w4 | 25

Your vehicle is equipped with wiring provisions for a 12-volt battery power supply.

Refer to the following information when adding electrical system. The wiring harness is

located below the instrument panel near the center of the vehicle. The following

information describes the breaker and relay location and provides a wiring diagram to

aid in connecting customer equipment.

The 12-volt battery power is supplied through two underhood mega fuses, one

125-amp and one 60-amp. This underhood power is fed to the breaker/relay center

via a harness that passes through the driver side front of the dash, and routed across

the instrument pane to a position forward of the glove box. The breaker/relay center

is mounted to the instrument panel structure forward of the glove box. The center

includes a plastic bracket, two relays, two 30-amp breakers and three 50-amp mega

circuit breakers.

Two 30-amp breakers supply power from the underhood 60-amp mega fuse through

the contacts of the control relays to a 12-gauge (3.0 mm2) blunt cut wires. These two

blunt cut leads are part of wire coiled under the instrument panel near the center of

the vehicle.

Each relay is operated by a 0.5 mm

blunt cut, light or dark blue control lead includes in

a 3-foot (91 cm) loop of wire under the instrument panel.

Three 50-amp mega circuit breakers, protected by three fusible links, supply power

directly from the underhood 125-amp mega fuse through three, 10-gauge (5.0 mm

)

wires. Two of the wires are routed through the body harness to a split buss junction

block to the left rear of the cargo area and secured near the jack and tools. This 3-foot

(91 cm) of coiled wires can be accessed by removing the cup holder on the top

of the trim panel. The third 10-gauge (5.0 mm

) wire is a blunt cut lead, which is part

of the 3-foot (91 cm) loop of wire coiled under the instrument panel near the center of

the vehicle.

An 8-gauge (8 mm

) ground lead is also provided and it is located under the front

passenger sill plate. It can be accessed by removing the sill plate and pulling the loop of

wire at the front of the plate, the lead is 3-feet (91 cm) long.

Blunt cut ignition control power and signal circuits are also included in the wire coiled

under the instrument panel near the center of the vehicle. They include:

• A yellow, 20-gauge (0.5 mm

) circuit, HOT in ACCESSORY, RUN or RAP (Retained

Accessory Power)*

• Pink, 20-gauge (0.5 mm

) circuit, HOT in START/RUN (7-amp maximum load)

• A yellow/black, 20-gauge (0.5 mm

) transmission park signal. This circuit provides

switched power when the transmission is in P (Park) and the engine is running. The

circuit is at 0-volts when the transmission is in any other position, i.e., R (Reverse),

N (Neutral), D (Drive) or M (Manual 6-1). Note that the circuit is also at 12-volts with

the transmission in P (Park) and the ignition is OFF. To avoid the possibility of

undesired parasitic electrical load with the ignition is OFF it is suggested that the Park/

Signal circuit be isolated by routing it through the normally open contacts of a

customer furnished ignition controlled relay.*

• A dark green/white, 20-gauge (0.5 mm

) Vehicle Speed Signal (VSS) provides 4,000

pulses per mile.

The breaker and relay center is located behind and above the instrument panel

storage compartment. Remove contents from the storage tray. Using the tab at the

back of the compartment drop the tray down gently toward the floor. You will find the

breaker/relay center above the right rear corner of the storage compartment. The

bracket is attached to the instrument panel structure with two screws. It will hang

from the hinge.

* These two circuits share a 15-amp fuse. (10-amp combined maximum load)

WIRING PROVISIONS FOR 12-VOLT BATTERY POWER SUPPLY

Tahoe/Suburban 3rd Row Seats

M. Deployment zone - Tahoe 3rd seat

N. Deployment zone - Suburban 3rd seat

O. Rear zones at back corner of headliner: 1 Tahoe, 2 Suburban

P. Bottom of 3rd seat zone at rear side trim cup holders

Q. Top edge of rear quarter trim at window

R. Rear of Tahoe

S. Rear of Suburban

Tahoe/Suburban/Silverado Crew Cab Seat Air bag

T. Center of door trim pull handle

U. Top of surface of outboard front seat cushion

V. Back edge of center pillar trim

Note: Wiring diagrams for these options are shown in the Police Package owner’s manual

supplement (shipped in glove box).

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Chevrolet 2010 Impala Service Manual Page 104

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