Mazda 1996 626 Service Manual page 167

Symptom
Flowchart No.3
Possible cause
• Burnt light bulb
• Open or short circuit in wiring harness
• Poor connection of connector
MX-6
626
E-42
EXTERIOR LIGHTING SYSTEM
Taillights do not illuminate
Step 1
Remove and check the taillight bulbs.
(Refer to pages E-50, E-52)
Bulb
OK
Burnt
Step 2
1. Turn the headlight switch on (first position).
2. Measure the voltage at terminal B (O) [626] or D (O)
[MX-6] of the rear combination light connector.
Voltage
B+
Other
Step 3
Measure the voltage at terminal C (0) of the inboard
combination light connector.
Voltage
B+
Other
Action
Go to Step 2
Replace bulb
B+: Battery positive voltage
Action
Repair wiring harness
(Rear combination light— GND)
and go to Step 3 (626)
Repair wiring harness
(TNS relay— Rear combination light)
and go to Step 3 (626)
B+: Battery positive voltage
Action
Repair wiring harness
(Inboard combination light— GND)
Repair wiring harness
(TNS relay— Inboard combination light)