Year: 1970
Description of problem: I'm wondering what wires go to which connection
i'm in the process of changing wiring loom on my car, and i'm converting from 2-gauge to 3-gauge 1275GT instruments.
but i'm wondering which wires that should be connected to what terminal on the tacho.
back of the tacho looks like this:
i've got three wires from the harness that i have "spare" after wiring the main gauge connector
1. Green powered from ignition
2. white from ignition switch
3. White/green that goes to + on coil
I'm using this schematics for the wiring
i found this text in a thread here, but none of the looks like my tacho.
RVI 1275GT Tacho
Male spade connector - 12V IGN Source (white wire)
Small Screw below spade connector - Earth (usually via screw into PCB)
Female bullet socket (next to screw) - Connection to coil +ve (white/green wire)
Male bullet (above female) - 12V IGN Source (white wire)
RVC 1275GT Tacho
Male spade connector - 12V IGN Source (white wire)
Small screw nearest male bullet connector (top right in photo) - Earth (usually via screw into PCB)
Male bullet - Connection to coil -ve terminal (usually white/black wire)
For future reference - ignore the wire colour shown in the photo above as it is incorrect!!!!
does anyone know what signal that goes to the spade and bullet connector? i'm wondering if the instruments i've got is from a 1976+ car. and that it needs signal from - on coil?