4 pin car relays


Joined Jan 28, 2005
Can you provide any information on the relay part number and/or perhaps a jpeg of the relay itself?


Thread Starter


Joined Mar 2, 2007
hi all that I know is that its a ford relay with terminal # on it 30 85 86 87 I need to know which terminals are from the switch and which are load ?


Joined Apr 20, 2004
If you have a meter, look for the pair of terminals that show a resistance. The other pair will be the load terminals, and should check open. Resistance through the coil may be in the range of 100 - 500 ohms.

If you have not got a meter, you can use clip leads or even wires to make a connection between ground (any part of the car or the battery terminal) and the battery positive terminal. The pair of pins that produce a click from the relay are for the coil.