1994 MAZDA MX-5 Workshop Manual

T LIGHTING SYSTEM r REAR COMBINATION LIGHT Disassembly 1. Use a hot air blower to soften the "hot melt" (bonding Turn signal switch (in combination switch) Front turn signal lights agent) around the lens. Step 6 1. Disconnect the parking brake switch connector. 2. Check for continuity between the terminal of the switch and ground. u T-19 T-64 2. Remove the lens from the light rear of the lens with a hammer I Parking brake lever Pulled one notch Released 45U0TX-153 4. If correct, repair wirring harness. (Parking brake switch - DRL control unit) Removal 1 Installation Refer to the following pages: housing by pushing the handle or round bar. Continuity Yes No Item Headlight switch (in combination switch) Hazard warning switch 3. Remove the old hot melt from the light housing. 3. If not as specified, adjust or replace the parking brake switch. Reference page T-19 T-21 Gartner Banana

LIGHTING SYSTEM T Assembly 1. If new hot melt is used, put Uni-sealer (8531 77 739) adhesive in the light housing groove. 2. Fit the new lens onto the light housing. Press the lens firmly so that it will adhere. 3. Allow the sealer to dry for about one hour. 4. Immerse the combination light in water to check for leaks. Gartner Banana

MAIN FUSE BLOCK FUSE BLOCK C-2 6 PMRmAIN L/R CONTROL MMULE (ENGINE1 (YCTIaN 0-1cl .CIGARETTE LIGHTER .INTERIOR LIGHT .REAR WINDOW OEFROSTER INSTRUMENT WINCmW DEFROSTER WOR SWITCHES (SECTIDN TI -05 REAR WINX)W DEFROSTER RELAY(R) -00 CIGARETTE LIGHTER (I) I-m REAR (R) -REAR NO. 2 (~21 11-07 REAR W INWW DEFROSTER IR21 1-09 INTERIOR LIGHT (I1 E-10 REAR WINOOW DEFROSTER SWITCH (It 1 Gartner Banana

LIGHTING SYSTEM T - --- -- Troubleshooting I Symptom: Interior llght(s) do not illuminate. 45UOTX-161 CONTRYL SWITCH Step 1 Verify the trouble symptom by operating the control switch and opening the doors. Go to the specified Step. Symptom Interior light(s) do not illuminate when control switches are in any position Step 2 1. Check the ROOM 10A fuse. 2. If the fuse is burned, replace it. Check and repair the wire harness if necessary. 3. If the fuse is OK, go to Step 3. Next step Step 2 Interior light(s) illuminate when control switches are in ON position, but do not illumi- nate with door open when switches are in DOOR position lnterior light(s) illuminate when control switches are in DOOR position, but do not illuminate when switches are in ON position Step 3 1. Check the bulb of each light. 2. If a bulb is burned, replace it. 3. If the bulbs are OK, go to Step 4. Step 5 Step 7 45UOTX-162 Gartner Banana

T LIGHTING SYSTEM Step 4 1. Set the control switches to ON position. 2. Measure the voltage at the following terminal-wires of each interior light connector. d B+: Batterv ~ositive voltaae Terminal Voltage B+ Other Step 5 1. Open both doors, and set the control switches to DOOR position. 2. Measure the voltage at terminal wire B (R/W) of each in- terior light connector. B+: Battery positive voltage --' Action Check C terminal Repair wiring harness (ROOM 10A fuse - Interior light) - c (B) Terminal I Voltage I Action I B+ I Go tp Step 6 I (WW) I Other I Redace interior liaht assembly B* Other Repair wiring harness (Interior light - GND) Replace interior light assembly Step 6 1. Disconnect the door switch connector, and check conti- nuity of each switch. 2. If not as specified, replace the door switch. 3. If the switches are OK, repair wiring harness. (Interior light - Door switch) Switch Pushed Released Step 7 1. Set the control switches to ON position. 2. Measure the voltage at terminal wire C (B) of the interior light connector. Continuity No Yes B+: Batterv ~ositive voltaae I Terminal I Voltage I Action I c (4 B+ Other Repair wiring harness (Interior light - GND) Replace interior liaht assembly Gartner Banana

LIGHTING SYSTEM T b I Symptom: Interior light@) remains illuminated. (Control switch: DOOR position) 45UOTX-168 Step 1 1. Disconnect the door switch connectors, and check conti- nuity of each switch as shown. 2. If not as specified, replace the door switch. 3. If the switches are OK, go to Step 2. Switch Pushed Released Step 2 1. Close both doors. 2. Disconnect the interior light connectors, and check con- tinuity between terminal wire B (RMI) and ground. Continuity No Yes I No I Replace interior light assembly 1 B+: Battery positive voltage Door Switch Inspection 1. Disconnect the door switch connector, and check conti- nuity of the switch as shown. Terminal B (W) --GND 2. If not as specified, replace the door switch. Continuity yes Switch Pushed Released Action Repair wiring harness (Interior light - Door switch) Continuity No Yes Gartner Banana

nia (i' [-I PACL LIGHT '-6 1.4k HEATER CDNTRCL CONTROL X3 SWITCH SWITCH ILLMI1UATIONS 1 -a? .ILLUMINATION LIGHTS WARNING I CRUISE CCNTQOL ILLVMINATION -0l PANEL LIGHT CONTROL SWITCH (I1 I 1-02 HEATER CONTROL SWITCH ILLGMINA~IONS (11 11-03 ASHTRAY ILLUMINATION (I) H-06 AT SELECT ILLUMINATION(II I -07 HAZARD WAWING AND RETRACTOFi SWITCH ILLUMINATION(II I-oz CRUISE CONTROL MAIN snITcn ILLWINATION (11 E-10 FRONT FOG LIGHT ANO REAR WIMOW DEFROSTER SUITCH ILLUMINATION (I) I Gartner Banana

LIGHTING SYSTEM T Troubleshooting Symptom: Illumination light control does not operate. Remedy 1. Turn the headlight switch ON. 2. Set the panel light control switch to Max. position. 3. Measure the voltage at the following terminal wires of the panel light control switch connector. B+: Battery positive voltage Terminal ( Voltage I Action I OV I Check D terminal Panel Light Control Switch Inspection 1. Remove the panel light control switch. 2. Apply battery positive voltage to terminal D and ground terminal G. 3. Check that the voltage at terminal a changes linearly when turning the control switch. A (R) I Max. ~osition I OV I OV Other Switch 4. If not as specified, replace the panel light control switch. Repair wiring harness (Panel light control switch - Each light) Replace panel light control switch Voltage Min. position 1 OV Gartner Banana