Hummer H3. Manual — part 1551

Fig. 18: Identifying Mirror Mounting Base Location
Courtesy of GENERAL MOTORS CORP.

1. Using a measuring tape, measure the distance between the windshield pillars from the

base of the shade line .

2. Using a marking pencil, halfway between the windshield pillars, draw a centerline (1)

on the windshield from the roof panel to the windshield base.

3. Draw a perpendicular line intersecting the centerline (2) at that location.

The top center of the mirror mounting base will be at the intersection of these lines.

2. Scrape the inside windshield glass thoroughly with a safety razor or utility knife in order to

remove all old adhesive.

3. If reinstalling the original mounting base, place the mirror mounting base in a suitable

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Mirrors - H3

holding device, such as a vice.

4. Scrape the mirror mounting base thoroughly with a safety razor or utility knife in order to

remove all old adhesive.

5. Clean the inside windshield glass and the mounting surface of the mirror mounting base

thoroughly with a clean cloth saturated with naphtha or a 50/50 mixture (by volume) of
clean water and isopropyl alcohol.

Fig. 19: Applying Adhesive To Mirror Base & Window
Courtesy of GENERAL MOTORS CORP.

6. Use Inside Mirror Adhesive Kit GM P/N 1052369 or equivalent to apply a small amount of

activator to the mounting surface of the mirror mounting base.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Mirrors - H3

7. Apply a small amount of activator to the windshield where the mounting base is to be

installed.

8. Allow the activator to dry 5 minutes.

9. Apply 1 drop of adhesive to the center of the mirror mounting base.

Fig. 20: Installing Mirror Mounting Base
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Do not touch the mounting surface of the mirror mounting

base or the glass.

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Mirrors - H3

10. Immediately apply the mounting base to the windshield, ensuring that the mounting base

aligns correctly to the marks made on the outside of the windshield.

11. Hold the mounting base firmly in place for 1 minute.

12. Allow the adhesive to set for 15 minutes.

13. Install the mirror to the mirror mounting base and fasten, if necessary.

14. Connect the electrical connector and install the wire cover, if equipped.

DESCRIPTION AND OPERATION

OUTSIDE MIRROR DESCRIPTION AND OPERATION

Power Mirror System Components

The power mirror system consists of the following components:

Outside rearview mirror switch

Mirror selector switch

Driver outside rearview mirror

Passenger outside rearview mirror

Body Control Module (BCM)

Each of the outside rearview mirror contains two motors. The vertical motor operates the mirror
in the up and down directions and the horizontal motor operates the mirror in the left and right
directions.

Power Mirror System Controls

The outside rearview mirror switch is a four position directional switch: Up, Down, Left and
Right.

The mirror select switch is a three position switch: left, center/neutral and right.

Power Mirror System Operation

The outside rearview mirror switch receives power through the inadvertent power supply voltage
circuit from the BCM. The power mirror switch also receives a constant ground.

The four positions of the direction switch have dual switch contacts. Each of the contacts are
connected to opposing sides of the appropriate power mirror motors through the selector switch.
The selector switch completes these circuits depending on the position of the selector switch, L or

2007 Hummer H3

2007 ACCESSORIES & EQUIPMENT Mirrors - H3