Quote:
Originally Posted by praatika
Hey!
Take (+) voltage using your red wire from any (+) wire, which is alive when the ignition is on.
+Pasi
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This may overload the fuse upstream, or even the main fuse if something like an air compressor is connected. Pehaps a relay using the wire mentioned abve as the control circuit may be better, the relay being connected directly to the battery with a 20A fuse in between.
Of course, you can even dispense with the relay (direct off the battery), but the lighter will then be powering the GPS even when the ignition is off - and may wind up discharging the battery if anything drawing a large current is being used while the engine is kept switched off.
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