Horn - TM-10-3930-630-120069

TM 10-3930-630-12

Figure 4-31. Brake master cylinder, installed view.

4-48. Horn

(4) If horn is producing a weak signal

a. General. A horn is installed on the truck as

proceed as follows:

(a) Connect a voltmeter between the

a warning device. The circuit for the horn includes a

horn terminal and ground. Press the horn button and

relay. Depressing the horn button in the center of the

observe the voltage on voltmeter.

steering wheel closes the circuit and operates the horn.

(b) If voltage is between 0 and 10.7

The horn is mounted on the right side of the truck

volts, check for an open circuit, defective horn relay,

behind the hydraulic oil filter.

b. Inspection.

defective

wiring or shorted horn coil Check horn button-to-ground

(1) Depress horn button and check horn

contact.

operation.

(2) Remove right front cowl Check horn

signal is

and relay connections.

(3) Check horn and relay for secure

mounting.

4-41