The Ford Barn

Marshall V. Daut · 03-18-2017, 07:27 PM

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You may have to move the charging rate up on your generator to compensate for the draw of current with the lights on. What does the ammeter read while driving normally? If only 3 amps, that will go to discharge when the lights are turned on at normal driving speed. 5 amps is borderline whether an adjustment is needed. Try revving up the engine with the lights on and then hit the horn. If the horn works under this condition, the generator needs a slight third brush adjustment. It wouldn't hurt to run an additional wire to the battery for added juice, but even that won't overcome a generator not putting out enough current. Just don't over do it and run the charging rate up too high, such as 10 amps. That will eventually burn out the generator if the car is run for a long distance at one time.
Marshall

03-18-2017, 07:27 PM	#5
Marshall V. Daut Senior Member Join Date: Apr 2011 Location: Davenport, Iowa Posts: 2,626	Re: Horn issue Sponsored Links (Register now to hide all advertisements) You may have to move the charging rate up on your generator to compensate for the draw of current with the lights on. What does the ammeter read while driving normally? If only 3 amps, that will go to discharge when the lights are turned on at normal driving speed. 5 amps is borderline whether an adjustment is needed. Try revving up the engine with the lights on and then hit the horn. If the horn works under this condition, the generator needs a slight third brush adjustment. It wouldn't hurt to run an additional wire to the battery for added juice, but even that won't overcome a generator not putting out enough current. Just don't over do it and run the charging rate up too high, such as 10 amps. That will eventually burn out the generator if the car is run for a long distance at one time. Marshall