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To reset the Uniden GMR1938-2 radio and turn off monitor mode, you can follow these steps:
1. Turn off the radio by pressing and holding the Power/Menu button until the unit powers down.
2. Once the radio is turned off, press and hold the Menu button.
3. While holding the Menu button, turn on the radio by pressing the Power/Menu button. Keep holding the Menu button until the display shows the Reset prompt.
4. Use the Channel Up or Channel Down button to navigate to the Reset option.
5. Press the Menu button to select the Reset option.
6. The display will show a confirmation message asking if you want to reset the radio. Use the Channel Up or Channel Down button to select "Yes" and press the Menu button to confirm.
7. The radio will reset to its factory default settings, including turning off the monitor mode.
After performing the reset, the monitor mode should be turned off on your Uniden GMR1938-2 radio. You can now use the radio normally without the monitor function active.
Driver door switch ,ajar switch . This switch is a input to the BCM - body control module .
Retained Accessory Power Description and Operation
Retained accessory power (RAP) is a vehicle power mode that permits the operation of selected customer convenience items after the ignition switch is turned OFF. These selected items will remain in operation until a passenger compartment door or liftgate is opened or until the RAP function timer reaches its shut-off limit.
The class 2 RAP power mode is mapped to GMLAN serial data circuit as Off Awake power mode. Refer to Data Link Communications Description and Operation for more information on data link communications. The BCM monitors the ignition switch signals, battery condition and the doors status to determine whether RAP should be initiated. The modules that support the RAP power mode will operate the systems under their control as required by their RAP power mode strategy.
RAP will end when one of the following conditions is met:
• The BCM detects the opening of a passenger compartment door.
• The RAP timer expires.
• The battery capacity decreases below a prescribed limit.
• Any other ignition switch state is chosen.
The function supported in the RAP power mode is the operation of the radio.
Check your batteries and clean your battery contacts with a pencil eraser. Transmit is the first thing to go when you have a low, bad or poorly connected battery. It would make a radio appear not to transmit to the other unit. Trade batteries between the units and see if the problem moves to the other radio, this would let you know if it is simply a battery problem.
Secondly, check your mic opening on radio two and make certain it is not covered or has debris in the hole.
You mention you have the manual, I will attach a link to the manual for others reading this post who may not have it.
When looking at the manual it appears using monitor mode checks for a weak signal. If this is the only way your radios will work together you could have one of the following problems:
1. Bad battery
2. Too far apart
3. Not on the same channel as one another
4. A radio with an internal problem
Press the Monitor button on the one you are listening to and transmit on the other radio and notice if you can hear it. Then switch the radios and try it. Make sure they are both on the same channel.
It is possible you are not getting the radio into programming mode. Hold the PTT and the monitor button in, and while continuing to hold them in, turn on the radio. When you hear a series of beeps followed by silence, you are in programming mode. Then you can continue with trying to program the radio. If this is not successful, then the radio has a problem. Suspect items include the PTT and , monitor button, or a failing battery.
Best regards.
Hold in the PTT and the monitor button while turning on the radio (wait for the sounds to stop) will put you into programming mode. You can then use the menu button and the +/- buttons to walk you through the settings. Using this menu, you can program your radio to match your other unit.
To read out your master radio, put it in programming mode, and simply press the menu button to walk through the settings. Do not press the +/- along the way, as it would change a setting. Once your have your master radio read-out, you can proceed with programming the one you are having a problem with.
you will not able to do it without a monitor. you'll need to get another montior in order to change the settings on computer. you need to change the resolution on that computer. sounds like the resolution is either too big or too small that it will not display it.
I have never seen a unit change modes on its own without there being an issue with the HB Switch. The only other possibility is if there is a CB module and the weather alert is active. For a better explination, or if the unit is out af warranty, contact Iron Cross Audio (www.ironcrossaudio.com)
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