Hi,

I grabbed the above screenshot from a wiring diagram, this isn't my area of expertise but I think I have a basic grasp.
In the fuel pump relay I have an input (86) and output (87) a ground (85). My assumption is that the relay receives an input, which energises and closes a coil between 87 & 30 (direct from 12v source) and sends off power to the fuel pump? But what is the purpose of 87a? The normally closed output for a common relay?
And if my relay were to fail, in an emergency to get home could I short it direct from 30 to 87? Sending power to the pump without the ignition needing to be on or the relay working?

I grabbed the above screenshot from a wiring diagram, this isn't my area of expertise but I think I have a basic grasp.
In the fuel pump relay I have an input (86) and output (87) a ground (85). My assumption is that the relay receives an input, which energises and closes a coil between 87 & 30 (direct from 12v source) and sends off power to the fuel pump? But what is the purpose of 87a? The normally closed output for a common relay?
And if my relay were to fail, in an emergency to get home could I short it direct from 30 to 87? Sending power to the pump without the ignition needing to be on or the relay working?