Pilot135pd
Well Known Member
I installed the Dynon AOA heated pitot and the last thing I need to connect is the heater controller malfunction wire.
I had connected it to the DB37 Pin 23 thinking it's a General Purpose Contact and all I need is for it to tell me when it goes to ground. So apparently it doesn't work there but I don’t know why it's not working there.
So I go back to the installation manual and on page 6-18 under Contacts shows what could be for the Pitot Heater so I go into the D180 and it lets me change the name to Pitot, doesn't mean it's for that though.
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FmesHABUl.jpg&hash=d0d4c07bf9966135a111f4a6b310ecd5)
This is what I entered ( any suggestions on what labels to enter here? ) :
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FDjZw1G4l.jpg&hash=00f8433b4a4a2e65be8dc4fbba7d9d67)
Then I find yet another page 3-18 that ALSO shows Contacts, but then here's the next issue. I open the EMS DB25 connector and it doesn't have those color wires (Brown/Blue or Brown/Yellow) plus it doesn't even have pins 1 through 5 or pins 14 through 17 installed. So I guess it's a homemade harness (even though they still used the ugly brown 2 wire cables). I have an 0-360 so it looks like they're using pins 6-13 and 18-25 for the EGT/CHT sensors.
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FWcfff8Nl.png&hash=cbe606ad5f4847c142735c64c05c907b)
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FLL7QKHCl.jpg&hash=216b1d1f99fc789e145017814a4b55c2)
Do I connect the pitot heater controller to Pin 9 like it says on Page 3-18? But if you follow the installation manual on Page 2-9 it shows Pin 9 is to be used for EGT #3...So where do I connect the wire ??? ....![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FrrcRjuql.png&hash=67fc2130241225b1401569729f77e8e4)
I had connected it to the DB37 Pin 23 thinking it's a General Purpose Contact and all I need is for it to tell me when it goes to ground. So apparently it doesn't work there but I don’t know why it's not working there.
So I go back to the installation manual and on page 6-18 under Contacts shows what could be for the Pitot Heater so I go into the D180 and it lets me change the name to Pitot, doesn't mean it's for that though.
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FmesHABUl.jpg&hash=d0d4c07bf9966135a111f4a6b310ecd5)
This is what I entered ( any suggestions on what labels to enter here? ) :
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FDjZw1G4l.jpg&hash=00f8433b4a4a2e65be8dc4fbba7d9d67)
Then I find yet another page 3-18 that ALSO shows Contacts, but then here's the next issue. I open the EMS DB25 connector and it doesn't have those color wires (Brown/Blue or Brown/Yellow) plus it doesn't even have pins 1 through 5 or pins 14 through 17 installed. So I guess it's a homemade harness (even though they still used the ugly brown 2 wire cables). I have an 0-360 so it looks like they're using pins 6-13 and 18-25 for the EGT/CHT sensors.
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FWcfff8Nl.png&hash=cbe606ad5f4847c142735c64c05c907b)
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FLL7QKHCl.jpg&hash=216b1d1f99fc789e145017814a4b55c2)
Do I connect the pitot heater controller to Pin 9 like it says on Page 3-18? But if you follow the installation manual on Page 2-9 it shows Pin 9 is to be used for EGT #3...So where do I connect the wire ??? ....
![](/proxy.php?image=http%3A%2F%2Fi.imgur.com%2FrrcRjuql.png&hash=67fc2130241225b1401569729f77e8e4)
Last edited: