The Ford Barn - View Single Post - OT: Question about auto electrical test device

Herb Concord Ca · 08-07-2025, 02:53 PM

If you plan on using it on the Model A. Connect the red, positive lead to ground. Use the black negative lead to measure voltages. Off the car, using the resistance scales, it won't matter which lead connects to what.
Hope this helps.

08-07-2025, 02:53 PM	#4
Herb Concord Ca Senior Member Join Date: May 2010 Location: Concord CA Posts: 755	Re: OT: Question about auto electrical test device If you plan on using it on the Model A. Connect the red, positive lead to ground. Use the black negative lead to measure voltages. Off the car, using the resistance scales, it won't matter which lead connects to what. Hope this helps.