The Ford Barn

DennisR · 09-09-2015, 10:31 AM

What amps does the Sparton pull?

Tom Wesenberg · 09-09-2015, 11:15 AM

Mine takes 4 to 5 amps. If you are using a battery charger only rated 4 or 5 amps it might take more to get the motor spinning, but while spinning it draws 4 to 5 amps when it's adjusted correctly.

DennisR · 09-09-2015, 11:20 AM

Quote:

Originally Posted by Tom Wesenberg

Mine takes 4 to 5 amps. If you are using a battery charger only rated 4 or 5 amps it might take more to get the motor spinning, but while spinning it draws 4 to 5 amps when it's adjusted correctly.

Thanks Tom, thought it was about that, just needed confirmation, Dennis.

Fullraceflathead · 09-09-2015, 01:10 PM

Mine shows about 10 amps and mine is a Stewart Warner.

Tom Wesenberg · 09-09-2015, 02:11 PM

Quote:

Originally Posted by Fullraceflathead

Mine shows about 10 amps and mine is a Stewart Warner.

Make sure neither field is grounded. I worked on a horn once where the motor spun OK, but one field was shorted. Just touch the ohm meter leads to one horn terminal and one to the horn mount or horn motor frame. You should get no meter movement.

I'll retest a horn later today to see what it draws.

Fullraceflathead · 09-09-2015, 03:43 PM

Sponsored Links (Register now to hide all advertisements)

I'll try that. I just cleaned the Commutator yesterday. It seems OK, but no change in the Amp draw.

Tom Wesenberg · 09-09-2015, 11:26 PM

I just measured my Stewart Warner and got 6 amps. I'll try to remember to measure my Sparton tomorrow.

09-09-2015, 10:31 AM	#1
DennisR Senior Member Join Date: Nov 2014 Location: Southampton, England Posts: 326	Horn amps What amps does the Sparton pull? __________________ Love a Lot, Trust a Few Always Paddle Your Own Canoe

09-09-2015, 11:15 AM	#2
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Horn amps Mine takes 4 to 5 amps. If you are using a battery charger only rated 4 or 5 amps it might take more to get the motor spinning, but while spinning it draws 4 to 5 amps when it's adjusted correctly.

09-09-2015, 01:10 PM	#4
Fullraceflathead Senior Member Join Date: May 2012 Location: Chillicothe, Missouri Posts: 1,176	Re: Horn amps Mine shows about 10 amps and mine is a Stewart Warner. __________________ "If I asked people what they wanted they would have said faster horses." -Henry Ford "Primitive technology is not a design flaw" 1928 Ford Model A Roadster Pickup 1930 Gordon Smith Air Compressor 1941 Willy's Pickup 1960 Thunderbird-For Sale 1964 Buick Riviera 2x4 425 1965 Pontiac GTO, 455 Super Duty 2004 Dodge Ram SRT-10, V-10 Viper 1977 Charger Jet Boat,460 Ford,Jacuzzi Jet Front Engine Nostalgia Dragster,Supercharged 296 "Fullrace Flathead" Ford Engine Build up on DVD ask

09-09-2015, 03:43 PM	#6
Fullraceflathead Senior Member Join Date: May 2012 Location: Chillicothe, Missouri Posts: 1,176	Re: Horn amps Sponsored Links (Register now to hide all advertisements) I'll try that. I just cleaned the Commutator yesterday. It seems OK, but no change in the Amp draw. __________________ "If I asked people what they wanted they would have said faster horses." -Henry Ford "Primitive technology is not a design flaw" 1928 Ford Model A Roadster Pickup 1930 Gordon Smith Air Compressor 1941 Willy's Pickup 1960 Thunderbird-For Sale 1964 Buick Riviera 2x4 425 1965 Pontiac GTO, 455 Super Duty 2004 Dodge Ram SRT-10, V-10 Viper 1977 Charger Jet Boat,460 Ford,Jacuzzi Jet Front Engine Nostalgia Dragster,Supercharged 296 "Fullrace Flathead" Ford Engine Build up on DVD ask

09-09-2015, 11:26 PM	#7
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Horn amps I just measured my Stewart Warner and got 6 amps. I'll try to remember to measure my Sparton tomorrow.