That's very helpful, thanks.
Originally Posted by
A and C
I had the same issues with a King KLN89B, the GPS signal worked most of the time and occasionally failed.
It turned out the problem was in the antenna line, I can't remember if it was at the antenna or box end but the line had gone intermittent.
The fix was cutting the line a few mm shorter and remaking the connector.
Thanks for this as well. I spoke to Garmin today as well and they suspect an antennae issue either with grounding or with a faulty antennae which could be radiating and causing both to lose signal. They have also suggested the installers give them a call tomorrow to discuss so let's see what happens...