No lights on the display. Alarm going off ? Changed main board , same problem ...no display alarm keeps going off.

LOW / NO BATTERY ALARM
The Low/No battery alarm will activate when the
power level of the battery becomes low. The display
will alternate between "b" (Battery, See figure 8) and
the cabinet temperature, the red alarm light will
become illuminated and the control panel will beep
every five seconds. To stop the audible alarm (beep),
press the "ALARM RESET" button. The red alarm
light will remain on and the display will continue to
flash until a new battery is installed. This same alarm
will activate if there is no battery installed

Not sure if this will work, but try this:
Open your car from the driverside door, if the alarm starts flashing, go to the passengerside door and use the key to unlock it. That should reset your factory alarm. GL

go to the manufactures website and download the user guide to locate the fault in the problem section

That sounds like a low voltage problem. Charge battery (in the trunk) and clean cable ends.

First, always check carbon brushes on main motor especially if the appliance is in use for several years.

Five times the red alarm means a problem with the engine washing.
So, could be:

E51 - Motor power triac short-circuited.
Current leakage from motor or from wiring; Main PCB faulty
E52 - No signal from motor tachometric generator.
Wiring faulty; Motor faulty; Main circuit board faulty.
E53 - Motor triac sensing circuit faulty (wrong input voltage to
microprocessor). Main circuit board faulty.
E54 - Motor relay contacts sticking (high voltage level when
the relay switches to OFF).
Current leakage from motor or from wiring; Main PCB faulty;

Rapid reading last alarms:
Press the START/PAUSE button and the nearest option button simultaneously (4 and 6) for at least 2 seconds: the LEDs initially switch off, and then display the flashing sequence indicating the last alarm.
Dado

This clock radio features a dual alarm system, with two separate alarms that can be operated independently. The alarms can be set to wake two people at different times, or to have a main alarm and a backup. One alarm features your choice of radio stations as an alarm wake sound, while the second features a buzzer wake sound. You can set the radio alarm, the buzzer alarm, or both alarms.
Setting Radio Alarm
1. Press the "Alarm Set" Button. The display will flash and the Radio Alarm Indicator will appear. If you do not begin setting the time within ten seconds of pressing the it, the display will stop flashing andd you will need to press the "alarm Set Button again. 2. While the display flashes, press the "Tuning/Set" Buttons to set the wake time. Hold a button for a few seconds to advance the time rapidly. Be sure to set the correct AM/PM time, as shown by the PM Indicator. 3. After setting the radio alarm time, you will need to select the station to wake up to. First, press the "AM/FM" Button to select a radio frequency. Next, select a station using the "Radio Preset Buttons". Rotate the Volume Thumbwheel to set a wake sound volume level. 4. After setting the radio alarm wake time and sound, you will need to select your 7-5-2 setting. The 7-5-2 setting lets you set the alarm for a full week, weekdays only, or the weekend. Before setting the alarm, be sure that the correct date is set. 5. After you have set the radio alarm wake time, wake sound, and 7-5-2 setting, press the "Alarm Set" Button twice so that the display shows the standard, non-flashing display.
Setting Buzzer Alarm
1. Press the "Alarm Set" Button twice. The display will flash and the Buzzer Alarm Indicator will appear. 2. While the display flashes, press the "Tuning/Set" Buttons to set the wake time, as described above. 3. After setting the buzzer wake time, use the "Date/7-5-2" Button to select the buzzer. 4. After you have set the buzzer wake time and 7-5-2 setting, press the "Alarm Set" Button once so that the display shows the standard, non- flashing display.
Activating the Alarms
1. To activate the radio alarm, press the "Radio Alarm" Button so that the Radio Alarm Indicator appears on the display. As long as this indicator appears, the alarm will sound at the set time and days. 2. To activate the buzzer alarm, press the "Buzzer Alarm" Button so that the Buzzer Alarm Indicator appears on the display. As long as this indicator appears, the alarm will sound at the set time and days. 3. When the alarm sounds, press the " Off/Reset" Button to turn off the alarm while still maintaining the programmed 7-5-2 alarm settings. To turn off an alarm and cancel its 7-5-2 settings, press its "Alarm Button" so that its Alarm Indicator no longer appears on the display. 4. To activate the snooze feature, press the "Snooze/Night-Light" Bar when the alarm sounds. The alarm will shut off for approximately nine minutes before sounding again. The feature can be repeated several times during the one-hour snooze cycle. 5. If it is not turned off, the alarm will sound for an hour before stopping. As long as an Alarm Indicator appears on the display, the alarm will sound at the set time, according to the 7-5-2 settings.

Hi, you have a common problem with your control boards; there is a cheap fix if you can use a soldering iron or you can have your modules repaired.
Let me know

bb

Locate the valet/override switch (button), (if you can't locate it, try tracing the wires under the dash from the main unit, usually a black and gray or black and red set of wires). Turn key to "RUN" position then press the button, the alarm's LED should light up solid at this time indicating valet mode as been set.

There is a few things to do check the door switches that control dome lights, check wire down by the skid plate when you get oil changed there is a sensor for the starter there if it is stolen the alarm will go off or just take a BAT and BEAT the living **** out of your horn and call it good like I am going to. I hope this helped or will help I recommend an aluminum bat vrs. wood

If you don't have the instructions, the buttons are labeled as follows:

Top Left is "Light" - Button A
Bottom Left is "Mode" - Button B
Top Right is "Start" - Button C
Bottom Right is "Reset" - Button D

With the time displayed, press the reset ("D button as listed in the instructions) and the alarm time should be displayed. While holding the "D"/reset button down, press the start or "C" button to toggle the alarm on or off.

Hope this helps