The MGA originally has the cable driven mechanical tach. Here a single white wire from the ignition switch runs to the fuse block for input to one of the fuses. From there the white circuit branches to feed the ignition coil and the fuel pump (both un-fused). When installing the electric...
The box has a bluetooth emblem on it, some will find the antenna is not included as it is a seperate part: #15938939? here is another view of the connectors on the bluetooth box w/antenna The procedure for replacing the box is very easy: First pull the onstar fuse in the interior...