1994 MAZDA MX-5 Workshop Manual

T FUSE DESCRIPTION Main Fuse Block The main fuse block is located on the right side of the engine compartment and contains nine fuses and two relays. -1 Fuse Box Fuse block No.1 is located above the dead pedal of the driver side. The fuse box cover shows the speci- fied fuse locations. A circuit breaker is included in the fuse box to protect the heater blower motor circuit. Fuse block No.2 is located to the side of the battery in the trunk compartment. 45UOTX-016 REPLACEMENT Caution Determine and correct the cause of a burnt fuse before replacing it. If the fuse is replaced before doing this, it may burn again. Plate type 1. Disconnect the negative battery cable. 2. Replace the failed fuse with the fuse puller. 3. Reconnect the negative battery cable. Cartridge-type 80A fuse (Black) 1. Disconnect the negative battery cable. 2. Remove the fuse block mounting nuts, and remove the service cover. 3. Remove the fuse installation bolts, and pull out the fuse. 4. Install the new fuse and the fuse installation bolts. 5. Install the main fuse block. 6. Reconnect the negative battery cable. Gartner Banana

RELAY T RELAY STRUCTURAL VIEW 1. Headlight relay 2. TNS relay 3. Retractable headlight relay 4. EGI main relay 5. Circuit-opening relay 6. Rear window defroster timer unit 7. Coolant fan relay 8. Horn relay 9. Flasher unit 10. Rear window defroster relay DESCRIPTION The DRL control unit (Canada only) controls the operation of the turn signal lights. When the ignition switch is at ON or START, the front turn signal lights illuminate as running lights, except when one of the following switches is on: Headlight switch. Turn signal light switch. Hazard warning switch. Parking brake switch. Gartner Banana

RELAY TIMER a 45UOTX-01 FLASHER UNIT Inspection 1. Turn the ianition switch to ON. RETRACTABLE HEADLIGHT RELAY Inspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity .- between terminals of the relay. B+: Batterv ~ositive voltaae Step -- -- M: Continuity Terminal A I H I G I B I D 1 2 3. If not as specified, replace the relay. 2. Operate the following switches and check the operation of the turn signal and hazard warning lights. 0 0 3. If not as specified, troubleshoot the circuit., 0 Switch Turn signal switch Hazard warning switch HAZARD WARNING SW - - 0 Procedure Right side ON Left side ON ON 0 B+ Operation Right turn signal lights flash Left turn signal lights flash All turn signal lights flash 0 GND V Gartner Banana

RELAY b TNS RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. I B+: Battery positive voltage 3. If not as specified, replace the relay. O O- - - HORN RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. B+: Battery positive voltage 45UOTX-016 I 1 Terminal I 0--0: Continuity Step 1 2 0--0: Continuity 3. If not as specified, replace the relay. 1 2 COOLANT FAN RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. Terminal B+: Battery positive voltage A 0 C 0 Step W: Continuity 1 2 3. If not as specified, replace the relay. B B+ 0 B+ Terminal D GND 0 GND A 0 c 0 B I D 0 B+ 0 GND Gartner Banana

T RELAY REAR WINDOW DEFROSTER RELAY Inspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. I 1 I I I 45UOTX419 I 2 0 0 B+ I GND I M: Continuity B+: Battery positive voltage Terminal 3. If not as specified, replace the relay. Step A 1 HEADLIGHT RELAY lnspection 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. C 3. If not as specified, replace the relay. '. B+: Battery positive voltage Terminal B 0 Step 1 2 D 0 M : Continuity A 0 B+ B 0 GND C 0 D 0 Gartner Banana

SWITCH T SWITCH STRUCTURAL VIEW 1. Ignition switch 2. Combination switch 3. Retractor switch 4. Hazard warning switch DESCRIPTION Combination Switch The combination switch is includes a clock spring type electrical connector for supplying electrical cur- rent to the air bag module and horn switches. When installing the combination switch, make sure the clock spring connector is properly aligned. If it is not, it may be broken or the steering wheel may not turn fully. (Refer to page T-19.) 45UOTX-022 Gartner Banana

T SWITCH IGNITION SWITCH Replacement 1. Disconnect the negative battery cable. 2. Remove the column covers. 3. Remove the screw and the ignition switch. 4. Install in the reverse order of removal. Inspection 1. Check for continuity between terminals of the switch. ACC 82 IG1 45UOTX-OX I Terminal 1 Position I B1 1 82 1 ACC I IG1 I IG2 I ST LOCK M: Continuity 2. If not as specified, replace the combination switch. Gartner Banana

SWITCH T COMBINATION SWITCH Removal 1 Installation 1. Disconnect the negative battery cable. - 2. Remove as shown in the figure. 3. Install in the reverse order of removal. Before installing the steering wheel, reset the clock spring connec- tor. COLUMN COVER TURN CLOCKWIS RETURN 2.75 TURNS - STEERING WHEEL / AIR BAG MODULE Clock spring connector adjustment 1. Set the front wheels straight ahead. 2. Turn the clock spring connector clockwise until it stops. Caution Do not force the front wheels straight ahead. 3. Return the connector 2.75 turns. 4. Align the marks on the clock spring connector and the outer housing. Gartner Banana