Please note that all of this information can be found in your Garmin installation manuals. Please refer to your Garmin manuals to confirm anything we tell you here.
Connect our pin 13 to pin 19 on the GTX-327 .
Connect our pin 22 (this is the same pin as pin 3 on the 9 pin PC serial connector) to the Garmin SL-30 37-pin connector pin # 4