Map lights randomly come on

If you have turn signals on the passenger side, the brake light fuse is good because the brake light uses the same lamp as the rear turn signal. Check the contact bumps* on the left-side lamp, lamp socket and wiring. If you see a green streak on the wire insulation, the insulation may have been damaged and the wire inside corroded through; this is especially a problem for wiring that is exposed to the underside of the vehicle.

The previous paragraph is based on the assumption that neither the left brake light nor the left turn signal are working. If this is not the case, please clarify.

"Sometimes the solder bumps on the end of the lamp get worn down so the filament is visibly good and passes continuity tests, but the bump doesn't make contact with the spring in the lamp socket. If the bump is visibly worn, you may either build it up with additional solder or just replace the bulb. Also, check the contacts inside the socket to make sure they are clean.

This is probably a bad earth connection, Try checking the connection to the rear light cluster for corrosion around the wiring plug, remove it and clean the connections, also check the bulb fittings, clean and replace bulbs into the holder. This is normally where the problem is, and could be due to water getting into the rear lights, good to check for this too.

i had that problem . i just pulled the light bulbs . no bulbs, no draining battery . unless you want to replace the door buttons and the overhead light . that might solve the short but until you do just pull the bulbs . hope that helps . Carrson

The bulbs is replaced from the back of the overhead console with 1/4 turn bulb holders.

the overhead console ( non rail version ) is held up with spring clips.

Open the rear compartment, and grab the rear corners and pull down 1 at a time. They are very hard to pull the 1st few times. Once you have the read released, there is another set of spring clips in the front, so be careful how far down you pull the rear, until the front is released.

Once you can see the back of the overhead console, you will see the 1/4 turn bulb holders for the map and interior lights.

P0068 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of power
- Engine rough idle Possible causes - Large vacuum leak
- Leaking air duct system
- Mass Air Flow (MAF) poor electrcial connection
- Manifold Absolute Pressure (MAP) poor electrcial connection
- Faulty Mass Air Flow (MAF) sensor
- Faulty Manifold Absolute Pressure (MAP) sensor
- TP sensor not seated properly.
- Faulty Throttle Position (TP) sensor.
- Dirty throttle body
When is the code detected? The Powertrain Control Module (PCM) monitors operation rationality check by comparing sensed throttle position to mass air flow readings
P0068 DODGE Description The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing Throttle Position (TP) to Mass Air Flow (MAF) readings. If, during a self-test, the comparison of the TP sensor and MAF sensor readings are not consistent with the calibrated load values, the test fails and a diagnostic trouble code is stored in continuous memory.

Symptoms Symptoms of a P0105 check engine light code may include:

• Poor running engine
• Engine runs rich
• Engine won't idle
• Engine backfires through tailpipe
• Engine misfire under load or at idle
• MIL (Malfunction Indicator Lamp) illumination
• In some extreme cases there may be no symptoms other than MIL illumination

Causes A P0105 DTC could be caused by:

• MAP sensor vacuum hose disconnected or plugged
• Bad MAP Sensor
  
• Bad TPS
• Damaged or problematic MAP sensor connector
• Damaged or problematic TPS connector
• Damaged wiring
• Short to reference voltage on signal circuit of MAP Sensor
  
• Loss of ground to MAP sensor or TPS
• Open on signal circuit of MAP sensor
• Bad PCM

Possible Solutions Using a scanner or code reader, turn the ignition on and engine OFF; what does the MAP sensor voltage read? It should be about 4 Volts for sea level. If you are at a higher altitude, it should decrease about half a volt or so for each 1,000 ft. of altitude (this will vary from model to model) Or if you have a separate MAF (Mass air flow) sensor on your vehicle, they are usually equipped with a Barometric pressure reading. If so, the Baro reading should match the MAP reading (they both measure ambient air pressure). If they're roughly equal, then, check for Freeze Frame data of the MAP sensor (if available).
NOTE: Freeze Frame data is the PCM recording a fault when it happens. It captures the readings of the various PIDS (parameter identifiers)available to troubleshoot what happened. It's like a recording of the problem as it happened. At idle a typical MAP sensor Voltage reading should be about a volt, and at WOT (wide open throttle) it should approach 4.5 to 5 Volts. As for the TPS, at idle, the voltage reading is about 1 Volt or less. As the throttle is opened the reading will increase to 4.5 Volts at WOT. Do the two readings make sense? For example, if the TPS reading on Freeze Frame data shows 2.5 Volts (indicating partial throttle) does the MAP sensor indicate a reading that isn't at either extreme? Using the Freeze Frame data (if available) compare the MAP reading to the TPS when the problem occurred. This can help you identify what happened
If you have no access to Freeze Frame data then check if the MAP sensor voltage changes when you apply vacuum to it. You can do this by mouth or a vacuum pump. The voltage should increase as you apply vacuum. If the reading doesn't change as you apply vacuum, make sure there are no obstructions in the hose to the sensor. If the hose is clear, the MAP sensor is usually bad, but it doesn't rule out the following from causing the problem: Does the MAP sensor appear to be stuck at less than .5 Volts? Then:
NOTE: This code shouldn't set if the MAP is stuck at extremely low voltage, however, I'm adding it in because there's no way to know for certain for which vehicles a low voltage condition may set a P0105

1. Inspect the wiring harness and MAP sensor connector. Repair any damage
2. Unplug the MAP sensor connector. Also, at the PCM connector, remove the MAP sensor signal wire and check for continuity to the MAP sensor connector. If there is infinite resistance, then repair open in MAP signal circuit. If the signal wire has continuity to the MAP sensor connector, then check for 5 volt reference voltage to the connector and a good ground. If both are present, then re-install all removed wiring and replace the MAP sensor.

Does the MAP sensor appear to be stuck at full 4.5 voltage? Then:

1. Inspect the wiring harness for damage. Repair as needed
2. Remove the MAP sensor signal wire from the PCM connector. With a voltmeter measure the voltage with KEY ON ENGINE OFF. Is there 4.5 Volts? If so, unplug the MAP sensor and recheck. If it is still present, then repair short between the signal wire and 5 volt reference wire.
3. If unplugging the MAP sensor causes the voltage to disappear, check that the ground is intact. If it is, then replace the MAP sensor due to internal short.

When a fuse blows you have 2 choices

Replace it once or just go to the wiring
diagrams & start diagnosing & testing,
until you find the cause of the electrical
system problem causing the high current

You need to know what is on that fused circuit

Unplug the overhead console. If the problem
goes away, you know the console needs to
be checked out. Or you work on the signal
problem WITH WIRING DIAGRAMS

You wouldn't go on a road trip without
a map,if you never been there before !!

You more likely have a bulb that is no good. The next time your signals aren't working, pull over and check to see which bulb isn't working. Make sure the turn signal is on while checking. It should only be the left or right. Not both. Sometimes you can see the blown bulb with the hazards on depending on your model vehicle. Simply check the bulb thats not blinking for a tight fit. Then replace it if thats not the cure.

check the front and rear turn signal and brake bulbs ,check for filament wear or drakness in bulb glass.if this is found replace bulb,you may also have a bad ground to a bulb socket, turn lights on (signal and break) and wiggle wires at bulb socket, watch light, if it dim any replace that socket and check the ground wire.

if you diconeect you will have no signals.
sometimes its the hazzrd swich sometimes its the signal light switch