how do you set up a reverse relay?

mp5

Member
How do you wire a relay so that when power is applied it opens the circuit instead of closing it? I am attempting to rewire my front parking lights so that when the fogs are on the orange parking light is off, but when the fogs are off, the front parking lights are on. I figure I could tap the fog switch to determine when they're on, but I don't know how to wire the relay so that when it receives power it opens the circuit to the front parking lights.
 
there are two type sof relays: constant on with switch off and constant off with switche on. just make sure you get the right one!
 
Back