Rado
A look at what is currently available on eBay
what color wires need to go where when installing a battery in a sailboat. are some for lights? rado? blue?
There is a standardized code set out by ABYC (American Boat and Yacht Council). It follows as best as I can with my bad memory
DC wiring code
Red=positive from battery to distribution panel
Yellow=negative from battery to ground strip (NOTE: This used to be black until the code was changed in 1997-1998 to prevent confusion with any AC lines on the boat. Black can still be used if there is no AC on the boat but it is not recommended.
Purple= ignition
blue=instrument lights positive
gray=navigation lights positive
light blue=cabin lights positive
brown=bilge pumps positive
Green=yacht bonding system to metal through hulls and all metal underwater appendages (struts, rudder logs and shaft logs)
Now to really confuse you. I have in one of my reference manuals these following two charts. Some of the colors may be a little contradictory, but it should at least give you an idea of what colors to use or what may already be on the boat.
Color Where Used / Function
Black All Ground until 1997-1998 change in code
Brown Reference Electrode MerCathode System
Orange Anode Electrode MerCathode System (The previous two are only for I/Os that use the mercathode system)
Lt. Blue/White Stripe Trim UP Switch
Lt. Green/White Stripe Trim DOWN Switch
Brown/White Stripe Trim Sender to Trim Gauge
Purple/White Stripe Trim "Trailer" Switch
Gray Tachometer Signal
Black/Yellow Stripe Shorting or Stop Circuit
Pink Fuel Sender to Gauge
Red Unprotected Wire from Battery
Red/Purple Stripe Protected (Fused) Wire from Battery
Red/Purple Stripe Protected (12 Volt +) to Trim Panel Control
Purple Ignition (Switch) to 12 Volt Positive
Tan Temperature Switch to Warning Horn
Tan Temperature Sender to Temperature Gauge
Tan/Blue Stripe Temperature Switch to Warning Horn
Yellow Starter Solenoid to Starter Motor
Yellow Starter to Regulator (Charging Circuit)
Yellow/Red Stripe Start Switch to Start Solenoid to Neutral Start Switch
Yellow/Black Stripe Choke (Enrichener System)
Green with Color Stripe Switch Box to Coil - Striped and Numbered
White/Black Stripe Bias Circuit (Switch Boxes)
The ABYC Recommended Colors which have a few variations follows ( this is directly out of the ABYC supplementary manual. I can't remember which of the manuals are in current use as I don't wire boats anymore (retired in 2000). Either way you go at least it gives you an outline for what to expect.
Color Where Used / Function
Yellow/Red Starting Circuits
Brown/Yellow or Yellow Bilge Blowers
Dark Grey Navigation Lights & Tach Signals
Orange Accessory Feeds
Brown Pumps
Purple Instrument Feeds
Dark Blue Cabin and instrument Lights
Light Blue Oil Pressure
Tan Water Temperature
Pink Fuel Gauge Sender
I realize that this is a long answer but I don't know how many items you will be putting on the sailboat or what size she is.
I know this answers your question.
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