How To Wire A Relay To Trigger Ground

But when the coil closes the switch in the relay it sends 12v down into th.

How to wire a relay to trigger ground. The interior mounted switch only draws minimal power though the interior fuse block to activate the relay. I ve hooked up one end of the relay s coil to a power source and the other end to my parking brake switch which provides a ground when engaged. Low voltage 16 ga wire for that and no power going thru the micro switch. The relay will carry the 12 volts with no problem and the little switch will only have to worry about completing the ground to turn on the relay.

Relay logic is all about wiring up relays for logical switching applications. A relay only requires one ground on the switch side. When this is the case use the following diagram. Relay logic provides you with a guide for using ncd relay controllers and how they can be wired for many types of applications.

Wiring with a relay allows the power to run straight from the battery through the relay mounted nearby directly to the lights. Wiring diagram terminal 86 12v trigger terminal 85 ground trigger terminal 30 12v source terminal 87 connects to device terminal 87a. See below for an example of a relay wiring diagram. How to wire automotive spdt relays.

This page demonstrates several simple ways to wire a relay for various applications. Often it is necessary to provide a stronger ground than the negative output of an alarm or keyless entry can provide. If you have a switch or an alarm or keyless entry that has a positive output that you wish to use to switch a device that requires a ground such as a horn dome light parking lights head lights hatch release etc wire a relay as shown below to convert the positive output trigger to a negative output. To get this switch to work i am wiring a relay into the switch circuit which will be a grnd actuating switch.