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Wiring Provisions for Emergency
Vehicle Roof Light - SEO TRW
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).
A. 25.39 inches
(645 mm)
B. 17.32 inches
(440 mm)
C. 3.94 inches
(100 mm) square
D. Roof Centerline
E. Roof Edge
1. Disconnect the negative (−) battery cable at the
battery.
2. Make the electrical connections using either
option A or option B.
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