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08-03-2018, 10:25 AM | #1 |
Junior Member
Join Date: Jul 2017
Location: Norwell, Ma
Posts: 23
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Horn doesn't work w headlights on
When I turn on my headlights on my model A, the ammeter shows a zero charge. Also my horn will not make any noise. Can I remedy this by increasing the cha
rge in the generator by moving the adjustable arm? What did Henry do about this? |
08-03-2018, 10:56 AM | #2 |
Senior Member
Join Date: May 2010
Location: Oregon
Posts: 5,947
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Re: Horn doesn't work w headlights on
Increasing the amp output may help some but is hard on the battery and generator if too much. Fix the horn and its connections and you will have it back like it was new. Start with some 3in1 oil on the felts inside the horn cover that may be a good start.
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08-03-2018, 11:04 AM | #3 |
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Join Date: Dec 2017
Location: Guthrie, OK
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Re: Horn doesn't work w headlights on
So horn works with lights off? Or horn doesn't work?
Ammeter has nothing to do with horn or lights, just battery charge. If it shows no discharge with lights/horn and with engine off, then you have a disconnect between generator and lighting switch at the bottom of the steering column. Open it up and have a look, but disconnect battery first. |
08-03-2018, 11:33 AM | #4 |
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Join Date: Dec 2016
Location: Sunrise Beach, Mo
Posts: 439
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Re: Horn doesn't work w headlights on
If the battery is good and being charged, no loose connections in charge path, then there is a wire not carrying current to the horn or a poor ground on the horn!
Did this just happen, or are there more facts to be told. Did this just start? Have U been doing any other things to the car you can trace back to relating. Be interested in knowing what you uncover. |
08-03-2018, 12:57 PM | #5 |
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Join Date: Jul 2017
Location: Norwell, Ma
Posts: 23
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Re: Horn doesn't work w headlights on
I recently installed a new wiring harness with new metal contacts that "plug" into their respective sides in front of the horn armature. It works okay without the lights but it has always been poor when they were on. So this is an old problem for me. The battery is fairly new and the car starts right up. I am just getting everything back together seven years after dismantelling it down to the bare chassis.
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08-03-2018, 01:25 PM | #6 |
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Location: Cape Cod MA
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Re: Horn doesn't work w headlights on
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08-03-2018, 10:17 PM | #7 |
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Join Date: May 2010
Location: Auburn Washington
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Re: Horn doesn't work w headlights on
you can move the third brush in the generator and put out more charge. but you will need to drive with your lights on during the day to keep from over charging your battery. the horn on my Victoria works better with the lights off and the engine running
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08-03-2018, 10:18 PM | #8 |
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Re: Horn doesn't work w headlights on
Clean and lube the horn.
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08-04-2018, 08:56 AM | #9 |
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Location: Portland OR
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Re: Horn doesn't work w headlights on
First off, I agree clean and lube the horn. He does not say "WHAT" he has the output set at with the light off and motor running at a fast idle, so it's guess work on our part. Nor do we know "WHAT" head lamps bulbs he is running.
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08-04-2018, 09:57 AM | #10 | |
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Join Date: Dec 2016
Location: Sunrise Beach, Mo
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Re: Horn doesn't work w headlights on
Quote:
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08-04-2018, 10:02 AM | #11 | |
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Join Date: Dec 2016
Location: Sunrise Beach, Mo
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Re: Horn doesn't work w headlights on
Quote:
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08-04-2018, 10:20 AM | #12 |
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Join Date: Mar 2014
Location: Midland Park,N.J.
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Re: Horn doesn't work w headlights on
you also can put a relay in the horn cover to get full battery voltage,but I still would try and diagnose the problem.
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08-04-2018, 02:16 PM | #13 |
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Join Date: Dec 2017
Location: Guthrie, OK
Posts: 1,141
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Re: Horn doesn't work w headlights on
Horn is connected directly to generator (and battery). Horn button provides ground contact. Dirt gets behind the horn button and is often the cause of the horn not sounding.
As for headlights, disconnect battery and check for continuity between the generator and light sockets, starting at the lighting switch. |
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