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Old 09-09-2015, 10:31 AM   #1
DennisR
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Default Horn amps

What amps does the Sparton pull?
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Old 09-09-2015, 11:15 AM   #2
Tom Wesenberg
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Default 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.
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Old 09-09-2015, 11:20 AM   #3
DennisR
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Default Re: Horn amps

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Originally Posted by Tom Wesenberg View Post
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.
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Old 09-09-2015, 01:10 PM   #4
Fullraceflathead
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Default Re: Horn amps

Mine shows about 10 amps and mine is a Stewart Warner.
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Old 09-09-2015, 02:11 PM   #5
Tom Wesenberg
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Default Re: Horn amps

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Originally Posted by Fullraceflathead View Post
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.
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Old 09-09-2015, 03:43 PM   #6
Fullraceflathead
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Default Re: Horn amps

I'll try that. I just cleaned the Commutator yesterday. It seems OK, but no change in the Amp draw.
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Old 09-09-2015, 11:26 PM   #7
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Default Re: Horn amps

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