When I press the "map" button a alert pops up and says,"External System Not Connected" Can somebody please help me?

Turn the vehicle on. The engine does not need to be running but the ignition should be on to power the stereo.

Step 2

Press the "Source" or "Power" button to turn the unit off.

Step 3

Press and hold down the "Minute" button (located to the left of the GM vehicle stereo's display. Some models require pressing and holding the left arrow button if no "Minute" button is present.) Release the button once the display shows "0000."

Step 4

Press the "Minute" button (or left arrow) to set the value of the third and fourth digits of the anti-theft code. Release the button once the proper value for the last two digits is displayed.

Step 5

Press the "Hour" button (or right arrow button) to set the first and second digits of the code. Release the button once the four-digit code is accurately displayed.

Press the "Mode" button to lock in the code you set. Turn the stereo deck on by pressing the "Source" or "Power" button to complete the reset.

USUALLY at the 'hidden' end of your BRAKE PEDAL a BRAKE SWITCH resides... much like a doorbell button.

As the pedal is pressed, the BUTTON (within the Switch itself)... 'pops out' and the Switch turns on = your brake lights turn ON. Note the two "adjustment nuts" in Photo 1.

IF the SWITCH is not positioned/adjusted correctly ~ the brake lights STAY ON. Many are designed to STAY ON if the switch itself fails... The hope is "constant-on" condition will alert the owner/driver of a brake system problem!

Please know many brake light switches may be installed at the master brake cylinder (Photo 2). Note: No adjustment nuts.

Demise, if it is a hose that is part of the cooling system, there will be no gasket, but the hose should be clamped securely with a new clamp to prevent it from coming off again. You will also have to refill coolant and possibly bleed the cooling system to prevent overheating issues. You really should notify the shop that did the head gasket, as this hose should not of came off and was an error on there part probably unless you had somebody else tinkering with the engine. Good Luck.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

I don't know for sure but some cars have a "DOME OVERRIDE" button usually somewhere the light switch on the dash. Not seeing your car the dome covers mostly require only slight pressure on either of the longer sides to remove, press against the side and at the same time pull downward.

Hi there.I think i can help u to turn off service alert, Its done in the following way:-
1.Switch ignition on ( do not start engine )
2.Switch radio ON.
3.Start engine.
4.Switch radio OFF.
5.Press and hold INFO button.
6.Turn volume control knob at least 30 clicks until self dianostic menu is displayed and an audible
signal is heard. ( while still holding the INFO button )
8.Using the circular dial ( Joystick ) select Confirmation/Adjustment and press centre of joystick
to ENTER.
9.Select Service and press ENTER.
10.Select Reset and press ENTER
11Press BACK button to return to main menu.
12.Switch OFF ignition
This should do the job, sorry it`s so long winded
Good luck John ( South Wales UK)

Labatche822,
The process for resetting your Tire Pressure Monitor (TPM) is below.
Good luck, let me know.
Regards.

To reset (calibrate) the system:
1. Turn the ignition switch to RUN.
2. Press the GAGE INFO button on the DIC until
TIRE PRESSURE appears on the display.
3. Press and hold the DIC RESET button for about five
seconds. After five seconds, the display will show
TIRE PRESSURE RESET. If TIRE PRESSURE
RESET does not appear on the display after about
five seconds, see your dealer for service. After you
release the DIC RESET button, TIRE PRESSURE
NORMAL will appear on the display.
The system completes the calibration process during
driving. During the first 10 to 25 miles (15 to 40 km) of
driving, the system will not alert you if a tire is high or
low. After 25 to 100 miles (40 to 160 km), the
system will only alert you about pressure differences of
12 psi (85 kPa) or more. After about 100 miles (160 km)
of driving, the system will alert you if one tire is
10 psi (69 kPa) different from the other three tires.

check more fuses, and check with a book on the car if there is a interior relay that might have burned up

Installing the DVD Map Disc Your dealer/retailer may have installed the map DVD. If the map DVD was not installed, do the following to load it:
Read the following steps completely.

1. Turn the ignition on. The vehicle must be in P (Park) to perform this operation.
2. Press (power) to turn the navigation system on.
3. Press the NAV hard key.
4. Touch the Insert Map Disc screen button. The screen opens to access the map DVD slot.
5. Load the map DVD partway into the slot. The system pulls it in. The screen cannot be closed until a double beep is heard.
   Notice: Pressing directly on the navigation screen may cause damage. Repairs would not be covered by the vehicle's warranty. Do not press directly on the navigation screen.
   
6. To close the screen, slightly push up on the two outer corners until the screen is in position. Then push the screen in by pushing on the four outer corners until a click is heard.
7. Set the search area. See "Setting the Search Area" earlier in this section.

Ejecting the DVD Map Disc The navigation portion of the system cannot be used if the DVD map disc is not loaded.

1. Press the MENU key to enter the Menu options, then press the MENU key repeatedly until Nav is selected or touch the Nav screen button.
2. Touch the Map Database Information screen button.
3. Touch the Eject Map Disc screen button. The screen tilts, exposing the map DVD slot.
4. Press the eject button, located next to the DVD map disc slot, and the disc ejects. Pull the disc out. The screen cannot be closed until a double beep is heard.
   Notice: Pressing directly on the navigation screen may cause damage. Repairs would not be covered by the vehicle's warranty. Do not press directly on the navigation screen.
   
5. To close the screen, slightly push up on the two outer corners until the screen is in position. Then push the screen in by pushing on the four outer corners until a click is heard.

Wiring short, or incorrect wiring of your alarm system. Go through the wiring, and make sure everything is connected to what it should be, and check the material condition of those wires while you're in there.

I own a 2002 lexus LS 430 with navigation system. The radio plays, but the volume and function on cd player does not work. The volume is real low and cant be turned up at all.