Installing fan relay

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I use my auxiliary switch on my dash to control one of the electric fans on the radiator. From the way it's wired (installed by someone else), it appears that the switch is used to connect the ground to the circuit. Does that sound right?

I plan to put in a fan relay to take the load off the switch. From the instructions (per the relay terminal numbers), it says to connect (86) on the relay to the switch, (87a) to power, (87) to + fan, (85) Black to ground.

I believe I also will need to ground the - fan wire itself.

Does that sound right?

Thanks.

Dennis

7/17/099:04 PM

Original Post

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