Technical Rac maxi-tune

I have an old MAXI-TUNE engine ****yzer. I lost the instructions and I need to know how to connect it. I have a black, red and yellow lead and separate wire that has a black and red wire connected to a metal plate

Any help would be appreciated. I'll be using it on a Ford flathead

Nick

 

Depends on what you're checking
clamp is always on spark plug #1


Tach:
Red on + black on - on battery

Rpm:
Red - on coil Black on ground

Dwell:

Red - on coil black on ground

Voltmeter:
Black on - battery red on + battery

 

Thanks

It's starting to sound familiar. I haven't used it since the 70's

 

Very welcome, good luck!