Headlights Do Not Operate. (U.s. Spec.) - Mazda MX-5 1990 Workshop Manual

T
LIGHTING SYSTEM
Description
The headlight system consists of two halogen headlights mounted on retractable mechanisms, a headlight
switch in the combination switch, and a retractor switch between the center ventilation outlets.
When the headlight switch is rotated to the second position, the headlights are activated and the headlight
retractor motors lift the headlights. If only the retractor switch is turned ON, the headlights will raise to the
upright position, but all lights will be off.
An emergency manual retractor knob is located atop each headlight retractor motor.
Warning
• When using the manual control knob, the negative battery cable must be disconnected to pre-
vent accidental movement of the headlight and possible injury.
Troubleshooting
(W/B) (R/L)
o
(R/L) (L/Y)
T-46
05UOTX-085
Symptom: Headlights do not operate. (U.S. spec.)
MAIN FUSE BLOCK
05UOTX-295
~~
HEADLIGHT RELAY
~
05UOTX-087
05UOTX-086
Step
1
1. Check HEAD 30A fuse in the main fuse block.
2. If the fuse is burned, replace it. Check and repair the wir-
ing harness, if necessary.
3. If the fuse is OK, go to Step 2.
Step 2
1. Turn the headlight switch ON.
2. Measure the voltage at the following terminal-wires of the
headlight relay connector.
Terminal-wire Voltage
Action
12V
Go to Step 3
(W/B)
OV Next check wire (LlY)
(L/Y)
12V
Go to Step 6
OV Next check wire (R/L)
12V
Next check wire (R/L)
(R/L: Terminal A)
OV
Repair wire (R/L)
(HEAD 30A-Headlight relay)
12V Replace headlight relay
(R/L: Terminal D)
OV
Repair wire (R/L)
(HEAD 30A-Headlight relay)