thermo fan, trigger buzzer when fuse blows

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acidgut

Member - Posts: 9

Joined: May 01, 2011

Posted: May 01, 2011 at 4:21 AM / IP Logged

I have a thermo fan on my 4x4, at times the fuse to the fan blows. I'd like to use a relay to trigger a buzzer to sound inside the car when the fuse blows. Any help with diagrams is greatly appreciated.

Thanks in advance

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: May 01, 2011 at 4:50 AM / IP Logged

You won't need a relay, wire as follows and this applies to a buzzer or an LED.

Ignition to + side of buzzer or LED, - side of buzzer or LED to fan feed AFTER fuse.

acidgut

Member - Posts: 9

Joined: May 01, 2011

Posted: May 01, 2011 at 5:46 AM / IP Logged

thanks for the quick reply. i tried what you suggested, it did not work. i put positive on buzzer to positive on battery, then to fan feed after fuse, with no luck. any other suggestions?

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: May 01, 2011 at 5:50 AM / IP Logged

Try the same thing then remove the fuse and see what happens.

If that fails, try the fuse on the actual fan feed + wire.

acidgut

Member - Posts: 9

Joined: May 01, 2011

Posted: May 01, 2011 at 5:56 AM / IP Logged

i tried to put positive from buzzer to power before the fuse ( it has power all the time) and negative on buzzer after fuse with fuse removed. no luck.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: May 01, 2011 at 6:20 AM / IP Logged

Check the actual fan wiring, the "HOT" (12v+) when running should sit on ground when the fuse is removed, this should work if you place the + side of the buzzer before the fuse, the - side after then remove the fuse.

I'd also wonder who did the original wiring because why does the fan blow it's fuse?

i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: May 01, 2011 at 6:22 AM / IP Logged

Wire the buzzer across the fuse just as Howie suggested. Triple your money back guarantee on this one.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: May 01, 2011 at 6:38 AM / IP Logged

Craig this is electronics 101 are we missing something? And I also eat Frogs (legs).

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: May 01, 2011 at 6:39 AM / IP Logged

Have you actually checked this buzzer across the battery to see if it works? Is there a relay after the fuse? Back to my earlier suggestion about the motor wire.

KPierson

Platinum - Posts: 3,527

Joined: April 14, 2005

Location: Ohio, United States

Posted: May 01, 2011 at 7:54 AM / IP Logged

Wouldn't the vehicle have to be at temp for the buzzer to work (the thermostat closed)?

How much current does your buzzer require?

Kevin Pierson

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