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2-4 Electrical
Section 2: Electrical
PCM — Red Area
NOTICE: DO NOT make electrical connections to vehicle electrical systems not specifically
designed for police equipment installations. Damage to the electrical system can occur.
Do not install any components into the PCM or PCM harness. Connecting into this system may
affect engine and transmission operation. As an example: connection of aftermarket electrical
equipment into the brake light circuit or any other circuit which is connected to the PCM, anti-lock
brake computer, air bag system or any other vehicle system will cause vehicle malfunction.
Disabling Brake Lights
Do not disable the brake light circuits for any reason. For additional information, refer to Section 1:
General Information in this guide.
Auxiliary Power Point (12V DC)
NOTICE: Do not plug optional accessories into the cigar lighter socket (if equipped).
Incorrect use of the lighter/socket can cause damage not covered by the warranty.
NOTICE: Power outlets are designed for accessory plugs only. Do not insert any other
object in the power outlet as this will damage the outlet and blow the fuse. Do not hang any
type of accessory or accessory bracket from the plug. Incorrect use of the power outlet can
cause damage not covered by the warranty.
The auxiliary power point is located on the instrument panel. Do not use the power point for
operating the cigar lighter element (if equipped). To prevent the fuse from being blown, do not use
the power point(s) over the vehicle capacity of 12V DC/180W. If the power point or cigar lighter
socket is not working, a fuse may have blown. To prevent the battery from being discharged, do
not use the power point longer than necessary when the engine is not running. Always keep the
power point caps closed when not being used.
General Guidelines
• Provide circuit protection (fuses) for all wiring. The fuse rating should not exceed either the rated
wiring current capacity or the total current requirements for all the add-on components on the
circuit. Install fuses as close to the point of tapped power as possible.
• Document all revisions to the electrical system and place with the vehicle Owner’s Literature.
Color code and/or label all revisions or additions to wiring.
• Provide protective covering in all areas that could be damaged during normal equipment
installations.
2010 Expedition SSV Modifiers Guide, 07/2009