I have a two filament turn signal/parking lamp on my car (3157A bulb). When the parking lights are on, the turn signal is not very noticeable, so I am trying to get the parking filament to turn off when turn signal is on. I understand I can achieve this by using a normally closed 12V relay. The 3157 bulb draws about 0.6amps for the parking lamp filament. I have two questions: 1) Since this is a very low current circuit would it be ok to use a generic automotive relay ie: bosch 30 or 40amp? Or should I use a smaller rated like 10amp or 5amp PC relay like this one https://www.e-sonic.com/ds/505330.pdf?p=45319483 2)Do I need to install a flyback diode in parallel with the coil to prevent damage, if so what size does it need to be?
Thanks in advance.