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  #1  
Old 01-24-2011, 08:26 AM
dunerookie dunerookie is offline
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Blend Door Actuator How to check

Ok I have a belnd door issue. I have read many threads. I proceeded to replace my blend door however when I took out the actuator and turned the control know nothing happened. So now I believe it is either the actuator or the control ****. I tried to check resistance/current but probably didnt do it right. But to me there is no power to the contol ****. Everything else works. Fan and switching from defrost to floor no issues. Any one have any ideas. Many thanks.

Larry
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Old 01-24-2011, 12:25 PM
chaser1602 chaser1602 is offline
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So check the actuator with jumper wires.See if it works
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Old 01-24-2011, 01:10 PM
dunerookie dunerookie is offline
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Thank you for your reply. Im am not good with electrical. However seems like a good idea. Ther are 5 wires that go into the connector. Would I just try the positive (red) and negative (black)?
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Old 01-24-2011, 01:53 PM
chaser1602 chaser1602 is offline
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Sounds like a plan. If the red one does nothing run it to the other terminals with the ground hooked up still
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Old 01-24-2011, 10:07 PM
bbsitum bbsitum is offline
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Just connect actuator to his original harness and see is it turn. Don't forget check ****. In my case **** was cracked and just spin around his metal rod.
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Old 01-24-2011, 10:34 PM
noonespecialer noonespecialer is offline
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There is no significant power at the three wire plug at the control ****, the three wires are directly wired to a potentiometer. In the five wire plug on the actuator there is a ground and twelve volts. To test ****, use a multimeter to check for changes in resistance from the middle to the outsides, and for a constant resistance on the outsides. Use a voltmeter to check for 12 volts at the actuator plug, hooking to the two wires that are diff colors than the three that go to the control ****. If you have 0 volts with key in run position, you prolly have blown fuse. The **** resistance can be checked regardless of key position. If turning the **** varies the resistance, and you have twelve volts in run, then your actuator is probably bad. iF turning the **** yields no change in resistance, than the **** is slipping and not turning the shaft it sits on.
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Old 01-25-2011, 09:15 AM
dunerookie dunerookie is offline
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Thanks for proceedure noonespecialer. I will give that a try. I will post my finding but it will be this weekend before I have an opportunity to check. Thanks again for the great ideas.
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Old 04-15-2012, 06:25 PM
grantbar grantbar is offline
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Blend door actuator problem- power to door?

I have a similiar problem to dunerookie on my 1999 Econoline E350. The blend door actuator will work for while and then die. Sometimes there appears to be power to the actuator, and other times not. I'm thinking there is a short somewhere between fuse #13 and the actuator, but I can't find it. I'm also wondering why a short would blow out the actuator instead of just stopping it from functioning during the time that it had no power.

The fuse itself is ok. I've already replaced the heater control switch.

Any assistance would be much appreciated.
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Old 04-15-2012, 08:59 PM
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if the actuator works part of the time, i would guess the gear box has stripped teeth or rod broken. You will need to remove and check to power to see if power comes and goes, or the gear box is stripped.
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Old 04-15-2012, 08:59 PM
 
 
 
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