Roof Beacon Switch

RebelThunder

Speak English or GTFO
Joined
May 20, 2009
Posts
12,662
Reaction score
0
Location
A Tree Stand
Since my truck has the snow plow prep package, I have a toggle switch up on the headliner for a beacon light. Where does the wiring for this switch run to? I wouldn't mind hooking up my aux. backup lights to this switch so I don't have to have to mount another switch.
 

daddy

I'm too LAZY to Choose a Custom Title!!!
Lifetime Supporting Member
Joined
May 17, 2009
Posts
46,699
Reaction score
69
Location
Pawnee, IN
Hopefully this will help. It appears it runs nowhere. It should be taped up behind the console.

*******************

Battery power is supplied through a 30 amp fuse to a wiring harness located in the roof. Power is controlled with a switch located in the overhead console. The customer or vehicle upfitter must complete the installation to an added accessory such as an emergency beacon lamp.

Maximum rated electrical load is 21 amps (250 watts). The added electrical requirements must not exceed 21 amps (250 watts). Running the accessory for long periods of time with the engine off may run the battery down.


Installation Instructions — Emergency Vehicle Roof Panel Lamp

Wiring to the accessory can be done by either directly connecting the wire in the roof to the accessory (Option A) or by using Wiring Harness Package part number 12150250 obtained from GM Service Parts (Option B).

***

1. Disconnect the battery negative (-) cable at the battery.

2. Make the electrical connections using either option A or option B.

Notice: Pulling the wiring harness through a panel hole that has sharp edges may cause damage to the wire and/or wire insulation. Remove sharp edges from the panel hole before pulling the wire through it.

Option A: Roof Wires Directly to Accessory

1. Drill a 3/8 inch to 1/2 inch (10 to 13 mm) hole in the outer roof panel in the area shown in the illustration. The hole should only go through the outer panel. Remove all sharp edges from the drilled hole.

2. Remove the inside overhead console access panel/lamp lenses.

3. The accessory harness is coil tied to the passenger’s side of the vehicle at the console inner bracket.

4. Cut the tape holding the harness coil.

5. As one person watches the roof hole from the outside for the end of the harness, a second person from the inside of the vehicle should snake the harness toward the hole.

6. Pull out the wiring harness being careful to avoid scraping the insulation on the edge of the hole.

7. Extend the wiring harness to the accessory.

8. Connect the dark green wire to the accessory hot terminal.

9. Connect the black wire to the accessory ground terminal.

10. Cover the hole in the roof with a durable sealant such as silicone rubber sealer.

11. Reinstall the overhead console access panel/lamp lenses.

***

Option B: Use Wiring Harness Package 1215 025 0.
Obtain from GM Service Parts through the GM Dealership

1. Drill a 1.25 inch (32 mm) hole in the outer roof panel in the area shown in the illustration. The hole should only go through the outer panel. Remove all sharp edges from the drilled hole.

2. Remove the inside overhead console access panel/lamp lenses.

3. The accessory harness is coil tied to the passenger’s side of the vehicle at the console inner bracket.

4. Cut the tape holding the harness coil.

5. As one person watches the roof hole from the outside for the end of the harness, a second person from the inside of the vehicle should snake the harness toward the hole.

6. Pull out the wiring harness being careful to avoid scraping the insulation on the edge of the hole.

7. Cut the wire to length. Install terminals to wire ends and insert into the connector. The brown wire goes to cavity A and the black wire in cavity B. Push in the secondary lock to retain the wires.

8. Attach the harness assembly from the package to the accessory. Cover with the supplied conduit for added protection. Connect the orange wire to the accessory hot terminal and the black wire to the ground.

9. Complete the connection from the roof harness to the extension harness. Cover the mated connector with the supplied foam. Push the foam covered connection and excess wire through the roof panel hole.

10. Reinstall the overhead console access panel/lamp lenses.
 

RebelThunder

Speak English or GTFO
Joined
May 20, 2009
Posts
12,662
Reaction score
0
Location
A Tree Stand
Good deal, I was hoping it didn't run back to the 3rd brake light or something.

Thanks man.
 

Members online

No members online now.

Latest posts

Forum statistics

Threads
28,722
Posts
1,102,587
Members
4,692
Latest member
Mrjvieira
Back
Top