OAT install with G5s and GPS175 already installed

[Romeo-Victor]

I’m installing a OAT probe in my 6. I already have a Garmin set up (2 G5s, GPS175 and GFC500). My question is ……has anyone done the wiring themselves? The Garmin manuals are a little confusing. I already bought the Davtron probe, the GAD13 and the connector kit. Just need a little clarity on how to wire it up and get correct displays.

Thank you!!!!

 

[recapen]

I did my G5 HSI install with the documentation provided. If you are adding the OAT to the end of the CANbus string, move the terminator to the GAD13 connector, otherwise, you need an in and out to keep the continuity of the CANbus. CANbus has one beginning and one end.

 

[Majorpayne317641]

It was very simple I added an OAT to my G5 CANBUS wiring. It’s just a daisy chain of wiring with the terminator plugs/resistor on each end just like the post before said. I didn’t do the Davtron. I did the Garmin GTP59/GAD13 kit which is the GAD59 probe and GAD13 data processing block that does the magic, but it should be the same. If you follow the install manual it is pretty clear on how the GAD13 and GTP59 needs to be wired. I’m sure you could use the davtron in place of GTP59 on the wiring schematics.

Once you wire it you then need to set it up in your G5 under its configuration menu by turning the GAD13 into a green checkmark and then you are done.

 

[Dan 57]

Did this on mine too... started with a single G5, then a 2nd one, then the 375 along with the OAT probe in the left wing access panel, all works perfect.
This is how I wired the Davtron probe to the GAD13

 

[scottlysan]

6. I already have a Garmin set up (2 G5s, GPS175 and GFC500). My question is ……has anyone done the wiring themselves? The Garmin manuals are a little confusing. I already bought the Davtron probe, the GAD13 and the connector kit. Just need a little clarity on how to wire it up and get correct displays.

I have done this. The toughest part is the CAN bus - you'll need to account for adding a node to the bus. For me, I mapped the bus (G5, G5, GAD-29, GMU11, GFC500) to see where the bus terminations were. Then I mounted the GAD13 near the GAD29 so I could just easily modify the GAD29 wiring to drop in the new GAD13 node. You're GPS175 is likely connected to the ARINC 429 bus and, if so, won't be a factor.