Where is the relay located. I've been looking on the internet for ages and can't find where the relay is.

The low pressure switch behind the osf bumper is getting a live feed to the switch and then it goes to the high pressure switch, behind the head light. This switch is a 4 pin switch. This also getting a live. As said it also get a live from the low pressure switch.

I'm thinking it could be a faulty relay and this is why I'm not getting any power to the air con pump.

Or does the air con pump get it's power from the engine ecu???