why did my fans engage when i tried i paperclip test? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-09-2010, 10:48 PM   #1
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Default why did my fans engage when i tried i paperclip test?

i was tryin to pull codes.when i jumped a and b then turn the ignition to the on position my fans clicked on.i swear i can never get them to come on without my constant on switch.
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Old 06-09-2010, 10:54 PM   #2
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Had you just finished driving it? The fans will come on at a set temperature.
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Old 06-09-2010, 11:31 PM   #3
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no they never come on! i could hear them click on and then click off when i pulled the jumper.even tried it twice to confirm it.
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Old 06-10-2010, 02:04 PM   #4
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The system always commands the fans full on when you pull codes, just to confirm they are working as they should be. The question is, what temp is the Bonne running at? Do they come on when you turn on the A/C?
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Old 06-10-2010, 02:13 PM   #5
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I just read in another thread that your Bonneville normally runs at 150*. Simply put, that is too low. Stock thermostat should maintain the vehicle at at least 195*. Fans come on around 200* I believe. Biggest cause of that is a faulty thermostat. We may have just added something to your to do list.
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Old 06-10-2010, 09:20 PM   #6
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yes the fans come on when i turn on the a/c.
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Old 06-10-2010, 09:21 PM   #7
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my bonnie usually runs around 200/220 degrees.
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Old 06-10-2010, 09:22 PM   #8
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I believe factory fans are set up as follows:
Fan 1 On at 212* Off at 208*
Fan 2 On at 226* Off at 223*
They also have speed determined settings and always are on when the AC is on.
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Old 06-10-2010, 09:42 PM   #9
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i swear mine dont come on by themselves.but, what u say is normal,218,i thought was freakin hot,so i wired the fans and havent took that chance since.
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