I’m trying to connect an autogage 2300 to an older MSD 6AL box. Ignition is all mSD, with blaster 2 coil and billet distributor. Dodge 318 engine.

The tach doesn’t move, despite following all wiring instructions. The tach output reads between 1.92-2.00 V at idle, when measuring with a voltmeter. Is that voltage correct? I read in another tread that it should be between 3-5 V.

How can I solve this?