I have completed a substantial portion of the electrical and would like to test things. Even though I bench tested the guage lighting and individual front and tail lights, I would like to pre test the directionals , dash lights, horns and front and rear lights with all installed in the car with the battery connected. The engine, however, is not in the car. Did I read somewhere that turning on the ignition without the engine was not a good idea. Or, should I just be careful with wires which are not connected.

If anyone or if everyone has done this, I'm looking for advice.