Mazda MX-5 1990 Workshop Manual page 669

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LIGHTING SYSTEM
T
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05UOTX-181
05UOTX-182
05UOTX-183
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Step 3
1. Check the bulb of each lamp.
2. If a bulb is burned, replace it.
3. If the bulbs are OK, go to Step 4.
Step 4
1 . Set the control switches to ON position.
2. Measure the voltage at the following terminal-wires of each
interior lamp connector.
Wire Voltage
Action
12V Next check wire (B)
(UR)
OV
Repair wire (UR)
(ROOM 10A fuse-Interior lamp)
12V
Repair wire (8)
(8)
(Interior lamp-Body ground)
OV
Replace interior lamp assembly
· Step 5
1 . Open both doors, and set the control switches to DOOR
position.
2. Measure the voltage at terminal-wire (R/W) of each interior
lamp connector.
Wire Voltage Action
(R/W)
12V Go to Step 6
OV
Replace interior lamp assembly
Step 6
1. Disconnect the door switch connector, and check continuity
of each switch.
Switch Continuity
Pushed No
Released Yes
2. If not as specified, replace the door switch.
3. If the switches are OK, repair wire (R/W). (Interior lamp-Door
switch)
Step 7
1. Set the control switches to ON position.
2. Measure the voltage at terminal-wire (8) of the interior lamp
connector.
Wire Voltage
Action
12V
Repair wire (6)
(8) (Interior lamp-Body ground)
OV Replace interior lamp assembly
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