silverghost
08-03-2013, 05:50 AM
I am trying to wire-up my old 1972 Holman~Moody Marine Donzi 18' Tachometer.
It came in a box of removed boat parts~
There are four wires comming out of it's case~
White
Yellow
Red
Light Blue
I assume one is for 12 Volt Battery Pos+ hot when the ignition keyswitch is turned on ?
One is Neg - ground ?
One is for the ignition coil's ponts opening & closing RPM pulse counting ?
And one is for a Tachometer gauge backlight ?
But Which color is connected to what ?
I also have a NOS 1970s Donzi 18 wiring harness in a bag with & extra gauge panel short plug-in harness that I bought from a former NJ Donzi 60s-70s dealer "Stone Harbor Marine"
I also could use the 1970s Donzi 18 wiring diagram color codes for the entire OEM boat wiring~~~But I suppose I coud figure those out myself if I have to ?
The Tachometer wiring is still an enigma ?
And I do NOT want to wire it incorrectly and burn it out.
Does anyone here know how the old Holman~Moody Marine Tachometer is wired ?
How about an entire boat wiring harness color code diagram for the entire 1972 Donzi 18 ?
It appears Donzi had NO FUSE panel on the wiring harness in 1972 ?
Was this true ~~~No FUSES~~~at ALL ?
Any ideas, or help appreciated !
Thank's
It came in a box of removed boat parts~
There are four wires comming out of it's case~
White
Yellow
Red
Light Blue
I assume one is for 12 Volt Battery Pos+ hot when the ignition keyswitch is turned on ?
One is Neg - ground ?
One is for the ignition coil's ponts opening & closing RPM pulse counting ?
And one is for a Tachometer gauge backlight ?
But Which color is connected to what ?
I also have a NOS 1970s Donzi 18 wiring harness in a bag with & extra gauge panel short plug-in harness that I bought from a former NJ Donzi 60s-70s dealer "Stone Harbor Marine"
I also could use the 1970s Donzi 18 wiring diagram color codes for the entire OEM boat wiring~~~But I suppose I coud figure those out myself if I have to ?
The Tachometer wiring is still an enigma ?
And I do NOT want to wire it incorrectly and burn it out.
Does anyone here know how the old Holman~Moody Marine Tachometer is wired ?
How about an entire boat wiring harness color code diagram for the entire 1972 Donzi 18 ?
It appears Donzi had NO FUSE panel on the wiring harness in 1972 ?
Was this true ~~~No FUSES~~~at ALL ?
Any ideas, or help appreciated !
Thank's