Headlight Does Not Operate (Right Or Left) - Mazda MX-5 1990 Workshop Manual

T
T-50
LIGHTING SYSTEM
Symptom: Headlight does not operate (right or left).
05UOTX-095
05UOTX-093
Step 1
1. Check the headlight bulbs.
2. If a bulb is burned replace it.
3. If the bulbs are OK, go to Step 2.
Step 2
1. Disconnect the headlight connectors of the faulty side.
2. Turn the headlight switch ON, and measure the voltage at
the following terminal-wires as shown.
Headlight Wire
Headlight
Voltage Action
switch
12V
Repair ground wire (8)
(RIB) Low beam
OV
Repair wire (RIB)
Left
(Headlight switch-Headlight)
12V Repair ground wire (8)
(R/W)
High beam
OV
Repair wire
(R/W)
(Headlight switch-Headlight)
12V
Repair ground wire (B)
(R/B)
Low beam
OV
Repair wire (RIB)
Right
(Headlight switch-Headlight)
12V
Repair ground wire (8)
(R/W) High beam
OV
Repair wire
(R/W)
(Headlight switch-Headlight)