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Coupes & Convertibles Porsche 911 Porsche 944 and 924
86 messages, Last post on Nov 05, 2009 at 5:35 PM
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Replying to: pitboss29 (Mar 17, 2008 1:33 pm) |
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Replying to: pitboss29 (Mar 17, 2008 1:33 pm) |
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I have a 1986 Porsche 944 non turbo that the cruise control doesn't work on, any suggestions on where to start? Thanks in advance, CJ
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Replying to: cejr3 (Jul 14, 2008 2:47 am)
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Replying to: todd82ta (Jul 14, 2008 3:23 am) CJ |
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1985 944 . The battery is discharging. finally heard the blower motor running (very faint) when I was replacing the battery once again. The blower screen/cover in place I could hear the faint sound of the motor running. Is it a RELAY, or the switch on the dash? not knowing were to look,can I replace the relay first ? Need Help !! Tom 
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Replying to: ironhorse1 (Sep 06, 2008 5:49 pm) Couple of things to consider. As with all Porsches, they are often over-engineered. Believe it or not, when you turn the ignition key in an early 944 to the on position. Even if the car isn't running, the VENT fan will run at 1/2 it's lowest speed. This is part of the mandated "flow-through" fresh air venting. The Porsche 944 actually has TWO cabin fan. There is the primary fan which is mounted front and center in the cowl area, this is called the "VENT FAN". The secondary fan is built into the A/C system under the passenger side dash. Although it's really odd... there are two fan controls (as you'll see). There is the huge A/C fan (which only recirculates air through the cabin) and the vent fan which brings in fresh air, and that is controlled by the knob a little bit lower down (to the left of the vent sliders). So, as I mentioned, the vent fan will ALWAYS run when the key is in the ignition and anywhere other than OFF. If it's running with the key out of the ignition, then you have a problem. HOWEVER... don't be confused (more about this overengineering stuff). When you've driven your Porsche 944... one of the radiator fans will remain ON (in a slow speed) when you shut the car off. The reason for this was to help lower the temperature of the radiator in case you start the car up again within a short period of time. The technical reason why this happens is because the fan switch is nothing more than a temperature sensor that is mounted on the drivers side rear of the radiator. The fan has a constant hot on one end, and a ground that persists through the sensor. When the sensor is hot (even when the car is off, and the key is out of the ignition) it will run. This is normal (although a bit annoying). As long as you can make sure that this is what you've been worried about, then you shoudl be OK!
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Replying to: todd82ta (Sep 06, 2008 6:43 pm) in my garage & not a daily driver,so after a week or two the battery is dead or at least needs a jump. the faint noise is from the the engine's bay, cowl near the firewall/windshield location. I believe the faint noise is the blower unit not turning off. If I disconnect the battery ,it goes off. place the cable back on the noise is there once again. No startup or ign. is needed to cause this problem. So I have to believe it's a relay or switch causing this "closed" circuit ? Where do I start ,the relay ; fresh air blower relay G1 sells for about 10 dollars. Is this it ? & where is it located on the dash? If it's not the relay ,can it be the switch on the DASH as you mentioned? I can get both parts but would like to eliminate the battery discharge now. Perhaps its the Ign switch ,some one said,but with the key out can there be this problem?
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Replying to: ironhorse1 (Sep 07, 2008 4:31 am) Also... I don't think this is it... but I would check. There is a motor (believe it or not) for the cruis control. In the older 944s (83-85), this motor is located on the rivers side, near the cowl, right inside the engine bay in front of the engine. When these go bad... they just run forever. A quick fix is to simply disconnect it's wiring harness. Not sure if this could be your problem, but I would just check it out to be sure. My 84 944 had a battery discharge problem, and that ended up being the culprit. Hope that helps. I would also suggest you check out www.RennList.com it's a really great web site and there are like several thousand people on that list with 944s.
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Replying to: todd82ta (Sep 07, 2008 5:24 am) The blower FAN ,sounds to be the problem,since I removed the battery cable the fan turns off,attach the batter leads and on it goes. there is NO key or IGN on . So is it a RELAY? if so where is it located ? or the next step..... Tom |
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