No manual operation of the horn is required. The horn will sound automatically on characteristic when
voltage is applied. To turn OFF, remove voltage, or use remote control by connecting a relay as shown on
drawing M-1331-C and described in note 1 thereon.
In many cases, it will be found that the location of the fog horn is such that any component requiring
service is best removed and serviced in a shop.
Removal of Dome. (see Drawing S-4368-C)
Loosen the nut on the clamp ring. If the nut is completely disengaged, be careful not to lose it. Unhook
the clamp and slide it down. The dome may then be lifted off.
Driver Unit (See Drawing S-2124-C)
The driver unit contains a powerful permanent magnet which is capable of attracting dirt and ferrous
particles to its surface. Care must be exercised at all times to keep particles away from driver unit,
especially when the unit is removed from the horn. To remove the driver unit, remove the dome, then
disconnect the two leads and remove the 4 screws 8045 0545. The driver may then be lifted out. Drawing
S-2124-C shows the driver unit inverted for servicing on a flat surface.
There is no reason for disassembling the permanent magnet and its related parts. If the magnetic structure
is disassembled, it
Form No 6310 0238