Mazda MX-5 1990 Workshop Manual page 676

T
05UOTX-196
05UOTX-19S
T-94
HORN
Canada spec.
1. Remove the steering shaft.
2. Check continuity between the horn conductor plate and the
serration gear part.
Horn switch
Continuity
ON Yes
OFF No
3. If not as specified, replace the horn switch and steering
wheel as an assembly.
4. If correct, repair wire (G/O) (Horn relay - horn switch).
Step 5
1. Remove the knee protector.
2. Disconnect the clock spring connector.
3. Check continuity of the clock spring connector as shown
in the figure.
Continuity
Action
Yes
Repair wire (G/O)
(Horn relay - Clock spring connector)
No Replace combination switch assembly
Warning .
• After installation of the air bag module, verify that
the air bag system is operating normally by monitor-
ing the air bag warning lamp.
(Refer to page T -138.)
Step 6
1. Ground the terminal wire (G/O) of the horn relay connector.
2. Measure the voltage at the following terminal wires of the
horn relay connector.
Wire Voltage
Action
(G/W) 12V
Next check wire (G/W) of terminal 0
Terminal A
OV Repair wire (G/W)
(STOP 15A fuse - Horn relay)
(G/W) 12V Next check wire (G/R)
Terminal D
OV
Repair wire (G/W)
(STOP 15A fuse - Horn relay)
(G/R) 12V Repair wire (G/R)
(Horn relay - Horn)
OV Replace horn relay