Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Manual toggle switch for Radiator Fan

  #1  
Old 04-16-2018, 09:02 PM
Luke Woessner's Avatar
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Location: Charlotte, NC
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Default Manual toggle switch for Radiator Fan

I'm looking to set up a manual toggle switch to operate my radiator fan. It hasnt worked for about 2 years and I've already gone through everything I could think of to fix it. (relay, temp sensor, wire condition, fan itself) I've decided it's just simpler and more reliable for autocross to wire up a toggle switch to operate the fan. (battery to switch, switch to relay, battery to relay, relay to ground, relay to fan, fan to ground + in line fuses in the system) What amp relay is recommended to operate the fan? (low speed) Am I forgetting anything?

Thanks for any input!
-Luke
 
  #2  
Old 04-16-2018, 09:24 PM
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Just use the one that's already there. It's free. I guess it's actually ground switched, but you can check me on that.

They use a lot of electricity. It takes a big relay to pull one.
 
  #3  
Old 04-16-2018, 10:58 PM
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At the radiator fan RELAY, there are two small ground wires. You ground one of them to turn on the fan, one is low speed, and one is high speed.
 
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