I am having a 3 pin relay used in bike horns. My need is to turn on and off ground using the positive as trigger. That means the positive terminal of the device is connected to the 12v supply. Usually we are turn on and off positive using ground. I need the opposite. Is it possible? If yes i can connect it to the device. I don't have any test environment. So i have to confirm before going forward.
Electronic – Can we switch ground in relay
12vrelaysolid-state-relay
Best Answer
Table 1. Pin functions
simulate this circuit – Schematic created using CircuitLab
Figure 1. Using a 3-pin, 12 V relay to use a switched positive signal to control a switched negative load.
For more on auto relays see 12 volt planet.