1994 MAZDA MX-5 warning

T LIGHTING SYSTEM FRONT TURN REAR TURN Step 9 1. Reconnect connector and turn the ignition switch to ON. 2. Set the turn signal switch to the right position and mea- sure voltage at terminal G(G/W) of the flasher unit con- -i nector. B+: Batterv ~ositive voltaae I Other I Replace flasher unit I Voltage 3. Set the turn signal switch to the left position and measure voltage at terminal D(G/B) of the flasher unit connector. Action B+: Battery positive voltage Alternates OV and B+ I Go to Step 10 I Voltage I Action I 1 Alternates OV and B+ 1 Go to Ste~ 10 1 I Other I Replace flasher unit I Step 10 1. Disconnect the turn signal light connectors. 2. Set the turn signal switch to the left or right position. 3. Measure the voltage at the terminals of the combination light connector. Light 1 Terminal I Voltage I I Alternates Front Alternates Front C (GIO) OV and B+ LH Alternates qyr I A (WB, I OV and B+ Ln I 1 Other - B+: Battery positive voltage Action I Go to Step 11 Go to Step 11 Go to Step 11 I Repair wiring harness (Flasher unit - Front combination liaht) Go to Step 11 I Repair wiring harness (Flasher unit - Rear combination light) 1. Turn the ignition switch to OFF. 2. Remove and check the bulbs. I Position I BUM I Action I Hazard warning 7 Hazard warning Bulb OK Burn OK Replace bulb Repair wiring harness (Front combination light - GND) Replace bulb Repair wiring harness (Rear combination light - GND) 4 Gartner Banana

LIGHTING SYSTEM T Symptom: Turn signals do not operate. (Hazard warning function operates normally.) J 45UOTX-I23 Step 1 Check the METER 15A fuse in the fuse block. Fuse 1 Action 1 I Burnt I Replace fuse after checking and repairing wirina harness I OK I GO to step 2 I Step 2 1. Turn the ignition switch to ON. 2. Measure voltage at terminal A(B/Y) of the combination switch connector. Other B+: Battery positive voltage Repair wiring harness (TURN fuse - Combination switch) Voltage B+ Step 3 Set the turn signal switch to ON (right or left) and mea- sure voltage at terminal C (GN) and terminal B(G/R) of the combination switch connector (&pin connector). Action Go to Step 3 B+: Battery positive voltage Terminal I Wire IVoltage 1 Action inspect combination switch (Refer to Daae T-20) Gartner Banana

LIGHTING SYSTEM T L Symptom: Hazard warning function does not operate. (Turn signals function normally.) 05UOTX-310 Step 1 1. Remove the hazard warning switch. 2. Check for continuity between terminal H(B) of the hazard warning switch connector and ground. I Continuity I Action I I Yes I GO to step 2 1 I No Repair wiring harness (Hazard warning switch connector - GND) I Step 2 1. Check for continuity between terminals of the hazard warning switch. Switch - -- Terminal 2. If correct, reconnect connector and go to Step 3. 3. If not as specified, replace the hazard warning switch. G ON OFF H I No Repair wiring harness (Flasher unit - Hazard warnina switch) I 0---0: Continuity 0 Step 3 1. Disconnect the flasher unit connector. 2. Turn on the hazard warning switch. 3. Check for continuity between terminal C(0) of the flasher unit and ground. 0 Continuity Yes Action Re~lace flasher unit Gartner Banana

T LIGHTING SYSTEM Turn Signal and Hazard Warning Light Removal / Installation Remove and install as shown in the figure. 1 FLASHER UNIT Turn Signal Switch Inspection 1. Remove the knee protector. 2. Disconnect the combination switch connector. 3. Check for continuity between terminals of the switch. Terminal I Switch FU 1 TL I TR I I I I Left 0 -0 1 I Right 0 I I 0 M: Continuity 4. If not as specified, replace the combination switch as an assembly. Gartner Banana

LIGHTING SYSTEM T Hazard Warning Switch Inspection 1. Remove the hazard warning switch. 2. Check for continuity between terminals of the switch. I off 0---0 : Continuity Switch On 3. If not as specified, replace the hazard warning switch and retractor switch as an assembly. Flasher Unit Inspection 1. Turn the ignition switch to ON. 2. Operate the following switches and check the operation of the turn signal and hazard warning lights. Terminal Switch G 0 Turn signal switch H 0 Hazard warning switch Procedure Operation I --- -- - ON 1 All turn signal lights flash I Right side ON Left side ON 3. If not as specified, troubleshoot the circuit. Right turn signal lights flash Left turn signal lights flash I > L R ? TURN SIGNAL SWITCH HAZARD WARNING LIGHT LIGHT SW Gartner Banana

LIGHTING SYSTEM T Symptom: Daytime running lights (DRL) do not illuminate. (Turn signals function normally.) DRL operate with engine running and following switches are off: Headlight switch Turn signal switch (Selected turn signal light flashes, other light remains illumi- nated) Hazard warning switch Parking brake switch (Parking brake released) Step 1 1. Position the vehicle on a flat surface and block the wheels to prevent vehicle movement. 2. Turn the ignition switch to ON. 3. Measure the voltage at the following terminal wires of the DRL control unit. 4. If correct, replace the DRL control unit. B+: Battery positive voltage Step 2 1. Disconnect the parking brake switch connector. 2. Check for continuity between the terminal of the switch and a body ground. Terminal J (L) u Connected to WIPER 20A fuse I(B) B (R) C (WIR) Parking brake lever Pulled one notch Continuity Yes Released Test condition Constant GND Parking brake switch Headlight switch No I 3. If not as specified, adjust or replace the parking brake switch. 4. If correct, repair wiring harness. (DRL control unit - Parking brake switch) Specification B+ Constant Parking brake released Headlight switch off Action Repair wiring harness (WIPER 20A - DRL control unit) Other B+ Other Repair wiring harness (DRL control unit - GND) Go to Step 2 Go to Step 3 Gartner Banana

T LIGHTING SYSTEM Step 3 1. Remove the column cover and disconnect the connec- tors of the headlight switch. 2. Check for continuity between the terminals of the head- Q light switch connector. Position I Terminal I I I I Headlight High beam I I 3. If not as specified, replace the combination switch. 4. If correct, repair wiring harness. (Headlight switch - DRL control unit) I Symptom: Daytime running lights (DRL) function does not cancel. OSUOTX-161 Headlight Low beam Step 1 1. Turn the ignition switch ON. 2. Verify the symptom by operating the following switches; the DRL should cancel. Go to the specified Step. Headlight switch. Hazard warning switch. Turn signal switch. Parking brake switch (lever pulled one notch). 0 1 0 0---0 : Continuity Symptom: DRL function not canceled when Headlight switch ON I Parking brake switch ON Step 5 I 05UOTX-163 Next Step Step 2 Hazard warning switch ON Turn signal switch ON Step 4 Step 4 4. If not as specified, go to Step 3. 5. If correct, replace the DRL control unit. Step 2 1. Turn on the ignition switch. 2. Turn on the headlight switch. 3. Check the voltage at the terminal wire C (WIR) of the DRL control unit connector. B+: Battery positive voltage J Terminal Voltage C (WIR) B+ Gartner Banana

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