Adjusting the Klaxon 3 horn

Loosen the two slotted head screws on top of the horn and adjust by turning the round nut on the rear of the horn. Clockwise to tighten adjustment and counterclockwise to loosen, then re-tighten the two screws. Oil every two weeks with a few drops of thin oil through the oiler on top of the horn.

Adjusting the Klaxon #6 Horn

The Klaxon #6 horn may be a little position sensitive.   Once it is mounted it may need to be tweaked slightly for maximum performance.

1)    Remove the rear cover.  There will be 1 or 2 small screws holding it on.

2)   Loosen the larger ½” hex lock nut by the rear of the armature.

3)   Adjust the smaller 3/8” hex bushing very slightly either way to get the sound desired.  Re-tighten the ½” lock nut and re-test.

4)   Replace the rear cover.goes here

Adjusting the Klaxon #7 & #8 Horn

The Klaxon #7 and #8 horns have only one adjustment, the large slotted screw on the back.  To adjust loosen the hex lock nut on the back and turn the screw slightly to the left or right to obtain the desired sound.

Adjusting the Klaxon 8c and 12c horns

Turn the exposed adjuster screw on the rear of the horn to set the amount of motor and diaphragm contact. Screw clockwise for more contact, counterclockwise for less contact, adjust for best sound.

Adjusting the Klaxon 11 horn

1. Remove central screw in rear cover and remove cover.

2. Bend the contact arm slightly one way or the other until the best ton is obtained. Bending the contact arm varies the current consumption of the horn, which should be about 7 amperes, and affects the tone. To decrease current consumption, bend the arm toward the diaphragm. To increase current consumption, bend arm toward the magnet core.

3. If the tone of the horn is not improved by varying the contact-point opening, change the air gap between the core and the armature. The gap should be approximately .040”. If a thickness gauge shows it to be greater or less than this, remove the diaphragm and armature assembly by unscrewing the nuts from the flange bolts. Then loosen the locknut and turn the screw in or out slightly, as required. When the correct adjustment is obtained, tighten the locknut securely.

The horn should be hooked up to a strong 6-volt battery with #14 or larger wire before proceeding.  It has one adjusting screw on the back.  If there is no noise or just a clicking noise when hooked up to a strong 6-volt battery, it must be adjusted. 

1    If there is no noise when hooked up to the battery, the small offset screw is screwed in to far.  If there is just a clicking noise, it is out too far.

2   Loosen the locknut and adjust the screw in or out until the horn makes some kind of beeping noise.  Very small adjustments make a big difference.  Keep adjusting this screw until you get the best noise and lock it down and recheck.

3  If this doesn’t work, the points may need to be cleaned.

Adjusting the Auto-Lite Horn

The Auto-Lite horn should not need to be adjusted unless the face has been replaced.  It should be hooked up to a strong 6-volt battery with #14 or larger wire before proceeding.  It has (2) adjusting screws on the back.  The one in the center is the air gap and the smaller one offset is the spring tension.  If there is no noise or just a clicking noise when hooked up to a strong 6-volt battery, it must be adjusted.  These are very durable horns and unless they have been in a fire and are burned up, a simple cleaning and adjusting is all that is required.  Most horn problems are due to bad grounds or weak electrical connections.

1)             Release the center screw by unlocking the 3/8” lock nut and back it off a couple of turns to be sure it is not contacting the diaphragm.

2)             If there is no noise when hooked up to the battery, the small offset screw is screwed in to far.  If there is just a clicking noise, it is out too far.

3)             Adjust this small screw in or out until there the horn makes some kind of beeping noise.  Very small adjustments make a big difference.  Keep adjusting this screw until you get the best noise and lock it down.

4)             Now adjust the center screw in until you get the best beep noise and lock it down.

5)             If none of these procedures work, the points may need to be cleaned.

THIS  HORN  HAS  BEEN  TESTED  FOR  TONE AND  VOLUME.     IF  AFTER  MOUNTING  TO BRACKET   TONE   IS   NOT   SATISFACTORY, TIGHTEN  OR  LOOSEN  SLIGHTLY  THE  STUDS HOLDING  BRACKET.  IF  THIS  DOES  NOT CORRECT  TONE,  LOOSEN  LOCKNUT  ON  THE  ADJUSTING   SCREW   AND   TURN  ADJUSTING SCREW   RIGHT OR LEFT   SLIGHTLY  UNTIL PROPER  TONE  IS  OBTAINED.

FACTORY  NO.  7546—BSCO.3079

Adjusting the EA Labs Horn

The EA Labs horn may need adjusting.  It has (2) adjusting screws, one on the back and the other on the front.  The one in the center of the face is for setting the air gap and the smaller one on the back is for setting the spring tension.  If there is no noise or just a clicking noise when hooked up to a strong 6-volt battery, the horn must be adjusted.  These are very durable horns and unless they have been in a fire and are burned up, a simple cleaning and adjusting is all that is required.

1)             Remove the face and replace the 3 face mounting screws.  Release the center screw by unlocking the 9/16” lock nut and back it off a couple of turns to be sure it is not contacting the armature.

2)             If there is no noise when hooked up to the battery, the small offset screw on the back is screwed in too far.  If there is just a clicking noise, it is out too far.

3)             Adjust this small screw in or out until there the horn makes some kind of beeping noise.  Very small adjustments make a big difference.  Keep adjusting this screw until you get the best noise and lock it down.

4)             Now adjust the center screw on the front in until you get the best beep noise and lock it down.  Replace the face.

5)             If none of these procedures work, the points may need to be cleaned.

There are two adjustments on the back of the horn. The screw in the center is for adjusting the air gap, it shouldn’t need to be changed, unless you are unable to get a satisfactory tone by adjusting the points. The off-center slotted head screw adjusts the tension on the points. If the horn only clicks, turn the screw counterclockwise. If the horn makes no noise, turn the screw clockwise, small changes make a big difference.

Adjusting the Delco-Remy Horn

The Delco-Remy horn may need adjusting.  It has (2) adjusting screws, one on the back and the other on the front.  The one in the center of the face is for setting the air gap and the smaller one on the back is for setting the spring tension.  If there is no noise or just a clicking noise when hooked up to a strong 6-volt battery, the horn must be adjusted.  These are very durable horns and unless they have been in a fire and are burned up, a simple cleaning and adjusting is all that is required.

1)             Remove the face and replace the 3 face mounting screws.  Release the center screw by unlocking the 9/16” lock nut and back it off a couple of turns to be sure it is not contacting the armature.

2)             If there is no noise when hooked up to the battery, the small offset screw on the back is screwed in too far.  If there is just a clicking noise, it is out too far.

3)             Adjust this small screw in or out until there the horn makes some kind of beeping noise.  Very small adjustments make a big difference.  Keep adjusting this screw until you get the best noise and lock it down.

4)             Now adjust the center screw on the front in until you get the best beep noise and lock it down.  Replace the face.

5)             If none of these procedures work, the points may need to be cleaned.

Adjusting Sparton motor driven horns

Turn the exposed adjuster screw on the rear of the horn to set the amount of motor and diaphragm contact. Screw clockwise for more contact, counterclockwise for less contact, adjust for best sound.