What is this??
- Thread starter MRD
- Start date
The friendliest place on the web for anyone who enjoys boating.
If you have answers, please help by responding to the unanswered posts.
If you have answers, please help by responding to the unanswered posts.
Nick F
Guru
- Joined
- Sep 2, 2020
- Messages
- 689
- Location
- Canada
- Vessel Name
- Callisto
- Vessel Make
- 1974 Grand Banks 42 Classic, Hull 433
There appear to be two other wires coming out of it (green and yellow).
It says Johnson Controls on it - they make heating (HVAC) controls for buildings.
Unscrew the two screws holding the cover on it and take a photo inside - then we might have a better chance of knowing what is.
Regards,
Nick
It says Johnson Controls on it - they make heating (HVAC) controls for buildings.
Unscrew the two screws holding the cover on it and take a photo inside - then we might have a better chance of knowing what is.
Regards,
Nick
MRD
Member
- Joined
- Feb 13, 2015
- Messages
- 14
- Location
- USA
- Vessel Name
- Splendid
- Vessel Make
- 1985 36 Marine Trader Europa
Thanks, Nick, It's pretty hard to get my big body back there it might come to that. On and off thru the years I've gotten serious about figuring out what it is but always hit dead ends. Even google seems to be clueless. The boat doesn't have marine air. Has a Freedom 1500 Inverter. Has an Onan 5 kw Smart generator.
TowLou
Senior Member
Some sort of relay? Trace the wires? Or ohm it out?
Maybe what it controls is switched on the ground. Not ground, negative. See if it clicks as someone throws switches.
Maybe what it controls is switched on the ground. Not ground, negative. See if it clicks as someone throws switches.
Last edited:
Alaskan Sea-Duction
Guru
- Joined
- Jul 6, 2012
- Messages
- 8,084
- Location
- USA
- Vessel Name
- Alaskan Sea-Duction
- Vessel Make
- 1988 M/Y Camargue YachtFisher
Yes open the box grasshopper. We all want to see.....
