Back-Up Light(S) Does Not Operate - Mazda MX-5 1990 Workshop Manual

T
Troubleshooting
METER
10A
T-72
LIGHTING SYSTEM
Symptom: Back-up light(s) does not operate.
05UOTX-311
05UOTX-313
05UOTX-313
9MUOTX-185
Step 1
Check METER 10A fuse.
If the fuse is burned, replace it. Check and repair the wire har-
ness, if necessary.
If the fuse is OK, go to Step 2.
Step 2
Check the back-up light bulbs.
If a bulb is burned, replace it.
If the bulbs are OK, go to Step 3.
Step 3
1. Turn the ignition switch ON, and shift the transmission to
reverse.
2. Measure the voltage at the terminal-wires of the back-up
light connectors.
Back-up light Wire
Voltage Action
(RIG)
12V
Next. check wire (8)
OV
Go to Step 4
Left
12V
Repair ground wire (8)
(B)
OV
Check for poor connection of
back-up light connector
(RIG)
12V Next, check wire (B)
OV
Go to Step
4
Right 12V
Repair ground wire (B)
(8)
OV
Check for poor connection of
back-up light connector