I took a relay out from the upper fuse box at the steering wheel today in my p reg 1.6 sx Bravo. When I tried to put it back in the headlights came on and the heater came on when I turned the light switch. Can anyone tell me what this relay does? and which way to put it in!! Its difficult to see up into the upper fuse box but I think the relay goes there. The spot I think it goes onle has two slots but the relay has 4. Its Black 20A and has the number 7676504 on it. Even if someone would put a photo on of the upper fuse box that would be great. Im at my wits end!!!