Cooling Fan Relay

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timkins

Member - Posts: 37

Joined: July 21, 2004

Location: United States

Posted: June 11, 2017 at 5:48 PM / IP Logged

I have an electric fan on my radiator that is switched by a relay. Today I melted a 30 amp fuse and the wire leading from the relay to the starter. I am a complete dummy when it come to the electrical and relays. The relay I am using is a 5 post relay with 86 going to the fuse panel. Post 85 goes to the starter with a 30 amp fuse in line,post 87a goes forward to the fan (I think) along with the post marked 30. I think the post marked 87 goes to ground I AM NOT sure. If someone has a diagram where all this goes I would appreciate it. If I wanted a manual switch where would it go along with an indicator light telling me the fan is on.

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the12volt

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Joined: March 07, 2002

Location: Louisiana, United States

Posted: June 12, 2017 at 8:40 AM / IP Logged

Connect as follows to have the fan come on when the ignition is on or when your switch is on:

85 to ignition 12V+ or switch

86 to ground

87 to fused 12V+

30 to fan positive

87a not connected to anything

Fan negative to ground

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Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.