The Ford Barn

Lefthander1930 · 12-05-2015, 12:00 AM

I have converted to 12 Volt. Looking at the wiring diagram it show the red & black wires go to the coil. Car is now neg ground. Where does the red go + or - and the black wire goes on the other side. Internal resistor coil installed. Thank you for any help.

Mike V. Florida · 12-05-2015, 12:36 AM

Don't know how much different your A is from stock other than the voltage and ground. Pick a wire and the follow it through the harness to the the end. If it stops at the battery it should be the + side of the battery and the + side of the coil. The other wire should go through the ignition to ground, in your case since you have changed it, the - side of the coil.

Tom Wesenberg · 12-05-2015, 01:59 AM

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You'll also have to switch the wires on the rear of the ammeter.

12-05-2015, 12:00 AM	#1
Lefthander1930 Senior Member Join Date: Nov 2015 Location: Roseville Ca. Posts: 176	Coil + - question I have converted to 12 Volt. Looking at the wiring diagram it show the red & black wires go to the coil. Car is now neg ground. Where does the red go + or - and the black wire goes on the other side. Internal resistor coil installed. Thank you for any help.

12-05-2015, 12:36 AM	#2
Mike V. Florida Senior Member Join Date: May 2010 Location: Florida between Sarasota and TampaSouth Florida Posts: 14,054	Re: Coil + - question Don't know how much different your A is from stock other than the voltage and ground. Pick a wire and the follow it through the harness to the the end. If it stops at the battery it should be the + side of the battery and the + side of the coil. The other wire should go through the ignition to ground, in your case since you have changed it, the - side of the coil. __________________ What's right about America is that although we have a mess of problems, we have great capacity - intellect and resources - to do some thing about them. - Henry Ford II

12-05-2015, 01:59 AM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Coil + - question Sponsored Links (Register now to hide all advertisements) You'll also have to switch the wires on the rear of the ammeter.