I have an older ‘bird 898 and need to use an antenna to check if my unit has gone bad or if the antenna is bad. The part number is 408920-1. If I’m out in left field asking for this, please excuse me. A new one is about $125 and if that’s not the issue it just adds to the injury. I could just as well add to that and buy a new unit. If there’s a way to test the antenna I have please let me know so I can move forward with this. I miss my GPS on a screen big enough to see with these old eyes. Thanks for any help.

