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Instrument ClusterNormally, the service engine soon light willstay on until the engine is cranked, thenturn itself off if no malfunctions arepresent. However, if after 15 seconds theservice engine soon light blinks eight times,it means that the vehicle is not ready forI/M testing. See Emission ControlSystem (page 144).Traction and Stability ControlIlluminates when the system isactive. If it remains illuminatedE138639or does not illuminate when youswitch the ignition on, this indicates amalfunction. During a malfunction thesystem will switch off. Have the systemchecked by your authorized dealerimmediately. See Using StabilityControl (page 168).Traction and Stability Control OffIlluminates when you switch thesystem off. It will go out whenyou switch the system back onor when you switch the ignition off. SeeUsing Stability Control (page 168).Transmission Tow/Haul (If Equipped)Illuminates when the tow/haulfeature has been activated. If theE161509 light flashes steadily, have thesystem serviced immediately, damage tothe transmission could occur. SeeAutomatic Transmission (page 147).4X2 (If Equipped)Illuminates momentarily whentwo-wheel drive high is selected.E163173 If the light fails to display whenthe ignition is turned on, or remains on,have the system serviced immediately byyour authorized dealer.4X4 Auto (If Equipped)Illuminates when the four-wheeldrive system is engaged. If theE166922light fails to display when theignition is turned on, or remains on, havethe system serviced immediately by yourauthorized dealer.4X4 LOW (If Equipped)Illuminates when four-wheeldrive low is engaged. If the lightE163174 fails to display when the ignitionis turned on, or remains on, have thesystem serviced immediately by yourauthorized dealer.4X4 HIGH (If Equipped)Illuminates when four-wheeldrive high is engaged. If the lightE163175 fails to display when the ignitionis turned on, or remains on, have thesystem serviced immediately by yourauthorized dealer.AUDIBLE WARNINGS ANDINDICATORSHeadlamps On Warning ChimeSounds when you remove the key from theignition and open the driver's door and youhave left the headlamps or parking lampson.Key in Ignition Warning ChimeSounds when you open the driver's doorand you have left the key in the ignitionwith it in the off or accessory position.85F150 (TF6) , enUSA