Originally Posted by paulee

Thanks for the help , I had a google thats why im confused 85 is ground and 30 is power so i still dont understand why these would need to be joined together , Its the only relay out of 4 wired up like this , was like this when i bought the car.
Yea i understand the pairing to save wiring alot of the earths have been joined together 2 the same cables end up as 1.
30 power to relay
85 ground
86 switch up/down
87 power to switch
Hope thats right im self teaching all this so thanks for the help.