We’ll go into more depth on that below.ĭriving without the brake lights working is just as unsafe as if your Liberty’s brake lights were stuck on. If even one of them comes on, you know that the brake light fuse isn’t blown. You should be able to see the brake lights illuminating the door.
Just back up really close to the garage door and push the pedal. You can test whether or not your Liberty’s brake lights are working all by yourself. The most common cause for this is a bad brake light switch. The good news is that troubleshooting brake lights that aren’t working isn’t too difficult. If your brake lights aren’t working, you’re way more likely to get rear ended than normal.
#2003 jeep liberty dashlights not working drivers#
They let other drivers know when you are slowing down, and that they need to slow down too. Refer to the appropriate diagnostic information.Brake lights are one of the most critical safety features that your Jeep Liberty has. However, proper testing of the PWM output of the EMIC and the electronic dimming level messages sent by the BCM over the PCI data bus requires the use of a DRBIIIt scan tool. The hard wired multi-function switch and EMIC panel lamps dimmer inputs and outputs may be diagnosed using conventional diagnostic methods.
#2003 jeep liberty dashlights not working full#
The BCM monitors the request for this mode from the multi-function switch, then sends an electronic dimming level message to the over the PCI data bus to illuminate all VFD units in the vehicle at full (daytime) intensity for easier visibility when driving in daylight with the exterior lighting turned on. In addition, the control ring on the left (lighting) control stalk of the multi-function switch has a Parade Mode position to provide a parade mode. The BCM also sends electronic dimming level messages over the PCI data bus to other electronic modules in the vehicle to control and synchronize the illumination intensity of their VFD units to that of the EMIC VFD unit. The cluster illumination lamps are grounded at all times. This PWM output is used to illuminate the cluster illumination lamps and the VFD on the EMIC circuit board, and provides a PWM output on the hard wired fused panel lamps dimmer switch signal circuit to control and synchronize the illumination intensity of other incandescent illumination lamps in the vehicle. Based upon the dimming level message, the EMIC then converts the battery current input to the appropriate 12-volt Pulse Width Modulated (PWM) output. The EMIC receives the electronic dimming level message from the BCM, and a battery current input from the energized park lamp relay on the hard wired fused park lamp relay output. In response to that input, the BCM provides a control output to energize the park lamp relay and an electronic dimming level message to the EMIC over the Programmable Communications Interface (PCI) data bus based upon internal programming. The Body Control Module (BCM) monitors a resistor multiplexed input from the multi-function switch on a panel lamps dimmer switch mux circuit. The illumination intensity of these lamps is adjusted when the interior lighting control ring on the left control stalk of the multifunction switch is rotated (down to dim, up to brighten) to one of six available minor detent positions. The ElectroMechanical Instrument Cluster (EMIC) has several illumination lamps that are illuminated when the exterior lighting is turned on with the headlamp switch. the part about the dimmer switch is in bold Most of the information I provided is not what you are looking for but may become important. Maryellen Mcgee darn Jeep could not have made this more complicated.
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