DBM20A 12V/12V-System in Trailer/Box
For a better understanding of how the system is programmed read first the Programming the system steps on page 6. Otherwise it can be that the system has to be reinstalled.
Read aswell the notes for the mounting and wiring extension on page 8 before to start the installation.
Please read Instructions carefully prior to installation.
Choice of light blue connection IGN:
- With alternators (smart alternators) that cut off charge temporarily, connect IGN wire to Car Ignition (Terminal 15). When the alternator turns off, the DBM20A keeps charging until the Main voltage drops below 11.9V or the alternator kicks in again.
- With all other alternators do not connect the light blue (IGN), DBM20A stops charging when the Main voltage drops below 12.7V. The DC/DC Charging automatically starts when Main voltage is higher than 13.3V.
- If needed connect the light blue IGN wire on Car Ignition (Terminal 15) with a plug, otherwise leave unconnected.
- Connect all black GND wires.
- Connect now the red wire (+main) aswell with a plug (Brad Harrison) (ATTENTION: system is starting up -> refer to page 6 Programming the system). (Continue installation only after System has switched to Stand-By mode)
- Connect the blue wire (+aux) at last.
Notice
For a safe installation it is necessary to install the fuses in the red wire path (+ main: 30A) and in the blue wire path (+ aux: 30A)!