#7282 - 09/06/10 05:51 PM
Cooling fans
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Full Throttle Member
Registered: 07/14/10
Posts: 166
Loc: FL
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Can anybody tell me how to test the cooling fans without access to a scan tool?
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#7283 - 09/06/10 08:04 PM
Re: Cooling fans
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Full Throttle Member
Registered: 04/06/03
Posts: 2895
Loc: North Augusta, SC
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With a cold engine, sitting in your driveway start the car with AC off, watch coolant temp on DIC, wait for fans to kick on/off. Even in FL you may have to gas it a bit to get to the second fan's setpoint.
I believe the stock settings are: fan 1 on @ 209, off @ 200 fan 2 on @ 219, off @ 210
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2007 LeMans Blue/2-Tone Gray MN6 Coupe, 3LT, Z51, QX1, CC3, R8C Mods List
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#7284 - 09/06/10 08:43 PM
Re: Cooling fans
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Full Throttle Member
Registered: 07/14/10
Posts: 166
Loc: FL
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How about if the radiator has been removed?
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#7286 - 09/08/10 07:15 AM
Re: Cooling fans
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Full Throttle Member
Registered: 07/14/10
Posts: 166
Loc: FL
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OK, thanks. I am trying to track down a short. The right fan is blowing the fuse.
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#7287 - 09/09/10 12:14 AM
Re: Cooling fans
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Full Throttle Member
Registered: 04/06/03
Posts: 2895
Loc: North Augusta, SC
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Unplug both fans as close to motor as possible, use ohm meter on left leads (known good one), then compare with right side. If right is significantly lower ohms, then probably bad motor, but look for melted wires between plug and motor first.
_________________________
2007 LeMans Blue/2-Tone Gray MN6 Coupe, 3LT, Z51, QX1, CC3, R8C Mods List
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#7288 - 09/13/10 04:20 PM
Re: Cooling fans
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Full Throttle Member
Registered: 07/14/10
Posts: 166
Loc: FL
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Thanks, that's a good idea. It's probably going to be the wiring, though, since I was off the track and the wiring bundle got pushed back up against the sway bar.
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#7289 - 09/17/10 02:42 PM
Re: Cooling fans
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Full Throttle Member
Registered: 07/14/10
Posts: 166
Loc: FL
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I pulled mini-relay #85 (fan #1) and inserted a wire to connect the grounds together (terminals 87 and 30) then connected terminal 86 and 85 with another section of wire. Both cooling fans came on when the ignition was turned on.
I found a small area on the insulation of the positive wire to the #2 fan that was worn from contact with the sway bar, so I'm hoping that a little electrical tape and have everything in its proper place and a new 30 A fuse and it'll be good to go.
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