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AC evaporator motor- where does the wiring come from prior to the white connector?
Just learned that my AC evaporator fan blower does not run (after completing an underdash rewire). I need some Pelican / Kuehl brain trust assist here. Where do the two wires that go into the white connector (Red w/ white stripe, and Brown) originate from? I've determined that the brown wire is not grounded, but I lose it visually as it dives behind the fan housing. Do they just disappear into a wrapped harness, or do they terminate somewhere where I can inspect them?
I've found that: 1. The fan WILL turn on when I take apart the white connector and jump it with auxiliary from a battery charger. 2. At that same connector, the red w/ white stripe wire from the harness DOES have 12V power when the key is on and the AC switch is calling for AC. So it appears that the car is asking the fan to run. (All the other Kuehl-supplied auxiliary AC condensers fans are running like mad at this step.) 3. HOWEVER, when I plug the harness connector together, the blower motor does not run. 4. If I jump the connector so that the car supplies the 12v to the red wire on fan, but I jump the earth side of the connector to direct ground, the fan runs. I could run a local ground and be done with this, but my OCD would like to know where that ground wire terminates on the body. Maybe something else shares it and I just haven't encountered it. thanks Ken 
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Ken 1986 930 2016 R1200RS |
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06-11-2016, 09:17 AM
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Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
Posts: 5,238
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A/c
 ^^^^^ Any help here? Gerry
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1986 911 Targa. Per Road and Track magazine: Only in L.A.: In the window of a bar in Hermosa Beach, California. "Happy Hour prices during all car chases." |
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06-11-2016, 09:45 AM
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Member 911 Anonymous
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Per the Bentley diagram page 970-49:
From the evap the red/white wire goes to the AC blower switch at console and also to the temperature bimetal switch located at passenger side footwell under the board. I would check the connections and continuity there.   
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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06-11-2016, 09:48 AM
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Member 911 Anonymous
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LOL, "Like Minds"
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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06-11-2016, 09:53 AM
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Thanks guys. I'll see if I can find it under the passenger floorboard.
Gerry, it looks like that Ground off the fan motor (labeled G104 at the bottom of your diagram) is what I'm interested in. Nowhere in that manual does it say where that ground point is, does it?
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Ken 1986 930 2016 R1200RS |
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06-11-2016, 10:41 AM
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Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
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Quote:
^^^^^ Here you go............(With pictures). Best, Gerry
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1986 911 Targa. Per Road and Track magazine: Only in L.A.: In the window of a bar in Hermosa Beach, California. "Happy Hour prices during all car chases." Last edited by 86 911 Targa; 06-11-2016 at 11:37 AM.. |
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06-11-2016, 11:22 AM
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911 Turbo
Marble Grey
