Lost my Can Bus on a coupled RNAV(gps) approach, thankfully not IMC.
Found a loose/broken wire at the AOA 260 molex. And reading the other forum posts, I realize I don't have the alternate path wired from the GSU25 to the GDU460 that is RS-232. I will do this ASAP before venturing out in IMC.
Here's my arithmetic question: my meter showed 120 ohms from Can Bus Hi to Can Bus Lo. Just like it's supposed to. BUT I also found Can Bus Hi to ground pin at 30 ohms. And Can Bus Lo to ground pin at 30 ohms. And the last two should be open.
So of course I'll start pulling units off the can bus until I can hopefully find the culprit. But I am puzzled, since I've had 400 hours on this panel....and the measurement of 30 ohms on both Can Bus Hi and Can Bus Lo seems to be more than coincidental.
Any observations that might make my troubleshooting quick and/or unecessary?
Found a loose/broken wire at the AOA 260 molex. And reading the other forum posts, I realize I don't have the alternate path wired from the GSU25 to the GDU460 that is RS-232. I will do this ASAP before venturing out in IMC.
Here's my arithmetic question: my meter showed 120 ohms from Can Bus Hi to Can Bus Lo. Just like it's supposed to. BUT I also found Can Bus Hi to ground pin at 30 ohms. And Can Bus Lo to ground pin at 30 ohms. And the last two should be open.
So of course I'll start pulling units off the can bus until I can hopefully find the culprit. But I am puzzled, since I've had 400 hours on this panel....and the measurement of 30 ohms on both Can Bus Hi and Can Bus Lo seems to be more than coincidental.
Any observations that might make my troubleshooting quick and/or unecessary?