Help! Electrical fans not working!

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Jul 25, 2002 | 04:57 PM

IT STINGS

Thread Starter

Instructor

Joined: Feb 2001

Posts: 233

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Help! Electrical fans not working!

I have the dual Spal units. The fans do not turn on when they reach their operating temperature. They also do not turn on when I turn on the A/C(They are suppose to). What should I check? Could the relays be bad? How do you check relays?

Thanks
Guillermo :mad

Jul 25, 2002 | 05:02 PM

Fevre

Race Director

Joined: Mar 2001

Posts: 11,322

Likes: 1

From: Living in the Hartland

Re: Help! Electrical fans not working! (IT STINGS)

Hook up some power directly to them. Got a battery charger? Check all connnections.

Jul 25, 2002 | 05:47 PM

daily_driver

Melting Slicks

Joined: Apr 2001

Posts: 2,280

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From: colorado springs CO

Re: Help! Electrical fans not working! (Fevre)

relays usually have 4 wires....

one is an output, one input and then the power wires positive and negative....

the negative is usually hooked upto a sensor such as the temperature sensor which provides a negative ground when it goes above 180 or whatever mounted in your intake manifold....

soo that turns on the relay connecting your input to output.... the input wire will always be hot (or ground) depending on what the output requires..... i am not familiar with how your fans are hooked up.....

but you get the idea??

Jul 25, 2002 | 06:04 PM

IT STINGS

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Instructor

Joined: Feb 2001

Posts: 233

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Re: Help! Electrical fans not working! (daily_driver)

Thanks
I'll try that. Hopefully that is all the problem is and I can fix it quickly. Lars is coming to town this Sat, and it would be a shame if I had to sit at home with the vette troubleshooting.