1987 MAZDA 626 Workshop Manual

1 5 STOP LIGHT
Both side stop lights do not illuminate when brake on.

Check the voltage
at A
(GW) terminal
of
stop light switch connector.
NG

Terminal Voltage
A (GW) 12V
Repair harness. (Fuse box
to
stop light switch)

OK

Check the stop light switch. Refer
to
page 15—51
NG
Replace the switch.

OK

Check the voltage between each terminal
of
the stop and tail light checker connector and
a
body ground when brake
on.

Terminal Voltage
B(B) OV
C (WG) 12V
NG Repair the wiring harness. (Stop light switch
to
stop and tail light checker, stop and tail light checker
to
body ground)

OK
OK

Repair the wiring harness. (Stop and tail light checker to bulb, bulb
to
body ground)

76G15X-049
Light Checker
1. Check for continuity between terminals of the stop
and tail light checker.
Stop and tail light checker (except West
Germany)
3 c £
r -r •
I i f 1 3
76G15X050

Terminal Continuity Terminal Continuity Terminal Continuity
i + i -
Continuity
+
1
-
Continuity
i + i -
Continuity
a-b
O
c-d
X
f-a
X

a-c
O
c-f
o
f-h
0

a-d
X c-g X g-a o

a-f
o
c-h
o
g-b
o

a-a
X
d-a
o a-c o

a-h
o
d-b
o
g-d
X

b-a
o
d-c
0
a-f
o

b-c
o
d-f
o
g-h
o

b-d
X
d-g
X
h-a
o

b-f
o
d-h
o
h-b
o

b-g
X
f-a
0
h-c
o

b-h
o
f-b
o
h-d
X

c-a
0
f-c
o
h-f
o

c-b
o
f-d
X
h-a
X

O: Indicates continuity
X: No
continuity

15-50

STOP
LIGHTS
1
5
Stop light checker
9 c a
d b
Tail light checker
c a
J f d b
Stop light checker (for West Germany)
76G15X-051

Terminal Continuity Terminal Continuity Terminal Continuity
+ -
Continuity
+ -
Continuity
+ -
Continuity
a-b O c-d X
X f:3__ X
a-c 0 c-f
X
X f-h X
a-d X c-g X g-a X
a-f X c-h X g-b X
a-g X d-a O
a-c
X
a-h X d-b
o
g-d X
b-a
o
d-c
o g-f
X
b-c
o
d-f X g-h X
b-d X d-g X h-a X
b-f X d-h X h-b X
b-g X f-a X h-c X
b-h X f-b X h-d X
c-a
0
f-c X h-f X
c-b
0
f-d X h-g X

Tail light checker (for West Germany)

Terminal Continuity Terminal Continuity Terminal Continuity
+ -
Continuity
+ i -
Continuity
+ -
Continuity
a-b
O
c-i X h-d X
a-c
0
oj
O
h-f
O

a-d
o
d-a
o
h-i X
a-t X d-b
o
h-j X
a-h X d-c
o i-a o

a-i X d-f X
i-b o

a-j
o
d-h X
i-c o

b-a
o
d-i X
i-d o

b-c
o
d-j
o
i-f X
b-d
o
f-a X i-h X
b-f X f-b X
i-j o

b-h X f-c X
j-a o

b-i X f-d X
j-b o

b-j
o
f-h
o j-c o

c-a
o
f-i X J-d
o

c-b
o
f-j X J-f X
c-d
o
h-a X i-h X
c-f X h-b X j-i X
c-h X h-c X
—

O: Indicates continuity
X: No
continuity

Note
Set the tester to x1000ft range.
2. If continuity is not as specified, replace the light
checker.
Stop Light Switch
1. Disconnect the stop light switch connector.
2. Check for continuity between terminals of the
switch.

———Terminal Position
~
•———____ a b
Pedal deoressed
Pedal released

86U15X-088
O
O :
Indicates continuity

15—51

15 HORN
HORN
STRUCTURAL VIEW
86U15X-089
CIRCUIT DIAGRAM
86U15X-090
15—52

HORN 15
TROUBLESHOOTING
Horn does not sound.
< >...For West Germany
OK
76G15X-052
INSPECTION
Horn Relay
Check for continuity between terminals of the relay.

Connectina
to
Terminal
12V Ground a b c d

— —
—O

a
b 0— —0
O—O: indicates continuity

86U15X-092
15—53

15 HEADLIGHT
HEADLIGHT
CIRCUIT DIAGRAM
TROUBLESHOOTING
Leaded Fuel Model
76G15X-055
15-54

HEADLIGHT 15
Unleaded fuel model
OK

Check
for
12V
at
"RB" wire (when low and/or "RW" wire (when high)
of
combination switch
6
pin con-nector

NG
Check
for
12V
at
"RB" wire (when low and/or "RW" wire (when high)
of
combination switch
6
pin con-nector

NG
Replace combination switch
Check
for
12V
at
"RB" wire (when low and/or "RW" wire (when high)
of
combination switch
6
pin con-nector

OK

Check the voltage between each terminal
of
the headlihgt relay and
a
body ground.
Terminal Voltage
a (RW) 12V
c(R) 12V
NQ Repair harness
(a
terminal
—
combination switch
to
headlight relay,
c
terminal
—
main fuse
to
headlight relay)

OK
OK —
Replace the bulb(s)

76G15X-053
INSPECTION
Headlight Relay
Check for continuity between terminals of the relay.

Connecting
to
Terminal
12V Ground a b c d

— —
O— —O
a b O— —-O
O—O: indicates continuity

76G15X-054
15—55