In the 1974 260Z service manual (BE-33) tach circuit diagram there is an 'in line' resistor drawn.

Where is this resistor located? The service manual isn't clear about this.

Thanks

Just had a look at a wire harness from a 74 260 ,should find what looks like an in line fuse holder taped ,single blue wire in and out.Check in the passenger side between the fuseblock and firewall grommet in the harness going to the engine compartment

Thanks, I will have a look.

Don't have the 260 diagram, but if it's connected to the Black / White wire coming from the coil, then it may be the resistor that's by the coil to drop the voltage at the points once the car is running. If you trace the wiring to it on the diagram, the resistor is bypassed while the starter is engaged, and current then flows through it once the car has started and the ignition switch is in the RUN mode.

Hope this helps

Enrique

It is in the blue wire from the coil to the tach.

The FSM shows a resister in the blue wire from the tach to the coil negative .It,s a single pigtail wire male-female connection where the harness passes through the firewall.Resistance checks @ 2.17k ohms

The FSM shows a resister in the blue wire from the tach to the coil negative .It,s a single pigtail wire male-female connection where the harness passes through the firewall.Resistance checks @ 2.17k ohms

Thanks again, I will get under the dash tomorrow and will find it!