If your Geo is like mine (a 1997 Metro) there is no fuse for the horn. There is a relay located on the top of the fuse box, it is the second one back from the firewall. To locate it put your hand above the fuse box, push the horn button and you will hear and feel a clicking sound. If you hear and feel the click the relay needs to be replaced. They simply unplug like a fuse.
not fuses or relay?
fan relay or fuses not working properly, probly the relay, you can straight witre it to find out
it could be the horn relay fuse located in the engine department with the other fuses.
the relay fuses are in the engine compartment on driver side with the mini fuses
where is heater blower relay for 1989 BMW 535I
check out the relay
The black fuses
Possibly an internal short on the fan itself, try replacing the fan.
if both fans quit working, it could be as simple as the relay fuse going out. have your mechanic check these fuses.
There is no relay. Just fuses/.
Check to see if you are getting power to motorIf so motor is defectiveIf not check fuses and relay
check the horn relay or the horn itself!