Mazda MX-5 1990 Workshop Manual page 658

T
LIGHTING SYSTEM
Symptom: No lights illuminate (taillights, side marker lights, and license plate lights).
(Canada spec.)
TAIL 15A
05UOTX-320
(W/R)
05UOTX-321
05UOTX-319
Step 1
1 _ Check 15A and A fuses.
2. If the fuse is burned, replace it. Check and, if necessary,
repair the wiring harness.
3. If the fuses are OK, go to Step 2.
Step 2
1. Turn the headlight switch ON.
2. Measure the voltage at the following terminal-wires of the
combination switch connector.
Wire Voltage Action
12V
Next check wire
(W/L)
(W/R)
OV Repair wire (W/R)
(TAIL 15A fuse - combination switch)
12V Repair the wiring harness
(W/L)
(Combination switch - body ground of
each light)
OV
Replace headlight switch
T-76