2010 Mercury Grand Marquis Owner Guide 2nd Printing - Page 274
2010 Mercury Grand Marquis Manual
Page 274 highlights
Crown Victoria Severe Duty Headlight flashers (wig-wags) - police An interfacing connector is provided on the headlight circuit for use of the headlights as alternating flashers (wig-wags). The connector is located in front of the radiator. A protective cap is attached to prevent contaminants from entering the connector when a wig-wag module is not installed. When installing a headlight flasher (wig-wag) module, remove the connector and tape it to the wigwag module harness. This will ensure that the cap is available to be reattached if the wig-wag module is removed. For additional information, refer to the Crown Victoria Wiring Diagram Manual. If your vehicle is equipped with one of the optional Police Interceptor Equipment Packages, the connector will already be used by the supplied wig-wag module that comes with the option package. Note: Use of the wig-wag feature overrides normal operation of the high beam headlights, including flash-to-pass. However, the low beam headlights will remain on and unaffected. HEAVY-DUTY SUSPENSION - POLICE This option includes certain heavy-duty components that contribute to the vehicle's stability and road handling capability under extremes of operation. The police vehicle has a heavy duty steering gear, extra control shock absorbers and heavy-duty front and rear stabilizer bars. COOLERS It is strongly recommended that auxiliary devices such as lights not be installed at the grille. Such devices will reduce airflow through the grille and could potentially impact the cooling system performance. Oil cooler - police The 4.6L engine has an engine oil cooler to maintain engine oil temperatures. Engine and transmission coolers External transmission and power steering coolers are located behind the grille and in front of the radiator. It is strongly recommended that auxiliary devices such as lights and sirens not be installed in the air path of these coolers as they will impact cooling system performance. 274 2010 Crown Victoria (cro) Owners Guide, 2nd Printing USA (fus)