Caerbont tachometer wiring

Notes:

Depending upon whether you're using an MSD ignition or not, the R/U or W/U (sometimes W) wire is used.

Always connect the black plug wire together with the black ground wire from the harness.

The black wire taped to the R/W lighting wire is not used.

The Caerbont reproduction of the Smiths tachometer is compatible with almost all ignition systems.

Several Nisonger and MoMa tachometers were used up to roughly chassis 570.