4 PIN RELAY?

Wed Feb 09, 2005 4:49 pm

Hi, can anyone tell me how to wire a 4 pin relay up, I am using it for a electric fan so I have got to wire in the temp swtich.

Wed Feb 09, 2005 5:08 pm

If I remember correctly terminals 30 & 85 are the switched contacts and terminals 86 & 87 power the solenoid. It doesn't matter which way you connect positive and negative to 86&87. Isn't there a small diagram on the relay somewhere? Also, if this relay is controlling an electric fan I'd make sure it's rated at least 25A if not 30A.

Wed Feb 09, 2005 5:16 pm

Sorry - I it's the other way round! Terminals 86 & 87 are the 'switch' and 30 & 85 power the solenoid which actuates the 'switch'.

If u want advice on how to connect the whole thing up e-mail me cos I fitted Kenlowe fans to loads of cars.

Wed Feb 09, 2005 5:31 pm

Thanks i have e mailed you

Wed Feb 09, 2005 6:25 pm

Is this right? live to temp switch then from the temp switch to T86.
T85 to GRD. T30 live . T87 to the fan and the fan to GRD.

Wed Feb 09, 2005 8:17 pm

jay528ise1985 wrote:Sorry - I it's the other way round! Terminals 86 & 87 are the 'switch' and 30 & 85 power the solenoid which actuates the 'switch'.

If u want advice on how to connect the whole thing up e-mail me cos I fitted Kenlowe fans to loads of cars.

I hope to heck you haven't wired up a bunch of fans...

On a STANDARD 4pin relay, 85 is the positive actuation, 86 the negative
This is the TRIGGER side of things

On the switched side, 30 is you power supply, and 87 goes to your device.

That said:
85 +12V from most anywhere
86 To temp sensor, which in turn should ground out at said temp
87 Heavy gauge wire (cable) to fan motor
30 Heavy gauge to battery and or power distrubtion block. Shoudl be fused with 30 amp fuse

Wed Feb 09, 2005 11:37 pm

There are two relay sockets and fuse positions for an electric fan already in place in the standard E30 fusebox. Just require the addition of two terminals and some wire.