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Garmin Display Dead
Posted: Tue Jul 14, 2026 6:50 pm
by Cctvdc
2018 R7 Out on boat today and display on both screens are blank. Looking into it found no power to each screen. I was able to grab 12 Vdc from under dash and feed power to Garmin and they displayed properly. I thought I have seen something on this forum as to a relay being a possible cause ?
Re: Garmin Display Dead
Posted: Wed Jul 15, 2026 4:25 pm
by tbully
Relay gets bumped behind the helm. (Where the radio amplifiers are, I believe). I haven't had that problem yet but anticipating it.
(Or sometimes they go bad)
Re: Garmin Display Dead
Posted: Sat Jul 18, 2026 6:54 am
by stifflkd
Bad relay that powers up the display. Common problem. The only issue is there are maybe 2-3 of these relays behind the dash and Cobalt is useless in telling you which one powers the displays. Where mine is located may not be where yours is.
Re: Garmin Display Dead
Posted: Sat Jul 18, 2026 5:42 pm
by Cctvdc
Thank You for responses, Does anyone have a wiring diagram for an 2018 R7 or direct me to a source ? I have all user manuals from the original purchase of our boat but no electrical diagrams. Went on Cobalt support and just saw user manuals I have.
Re: Garmin Display Dead
Posted: Mon Aug 24, 2026 1:04 pm
by Cctvdc
Update on display easy and no cost fix. After getting wiring diagram from Cobalt and looking at them it showed a circuit breaker panel that I was unaware of located in front of the helm in the swing up sea storage very well tucked behind the fender storage. Inspected area and found the cover to the panel had come off from everything we packed in there for a day on the boat. Also on the floor was a circuit breaker that had come out of block assembly. Lesson learned look for the obvious first.
Re: Garmin Display Dead
Posted: Sat Aug 29, 2026 3:01 pm
by jhnmdahl
Cctvdc wrote: Mon Aug 24, 2026 1:04 pm
Update on display easy and no cost fix. After getting wiring diagram from Cobalt and looking at them it showed a circuit breaker panel that I was unaware of located in front of the helm in the swing up sea storage very well tucked behind the fender storage. Inspected area and found the cover to the panel had come off from everything we packed in there for a day on the boat. Also on the floor was a circuit breaker that had come out of block assembly. Lesson learned look for the obvious first.
Glad you found it, and thanks for reporting back with the solution!