1994 MAZDA MX-5 relay

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

LIGHTING SYSTEM T LAY Step 2 1. Turn the headlight switch ON. 2. Measure the voltage at the following terminal-wires of the headlight relay connector. B+: Battery positive voltage Other Action Go to Step 3 Check B terminal Go to Step 6 Check A terminal Check D terminal Repair wirring harness Repair wiring harness (HEAD 30A - Headliclht relav) I Step 3 1. Turn the headlight switch ON. 2. Measure the voltaae at the followinn terminal-wires of - the headlight switch connector. B+: Battery positive voltage Termlnal I Switch position I Voltage / Action I Check I terminal switch) Low beam G B+ Other - Go to Step 4 Replace combination switch High beam Step 4 1. Check the headlight bulbs. 2. If a bulb is burned, replace it. 3. If the bulbs are OK, go to Step 5. B+ Other Go to Step 4 Replace combination switch Gartner Banana

T LIGHTING SYSTEM Step 5 1. Disconnect the headlight connectors. 2. Turn the headlight switch on. 3. Measure the voltage at the following terminal wires. d B+: Battery positive voltage Switch position Low beam High beam Voltage B+ Other B+ Action Repair wiring harness (Retractable headlight - GND) Repair wiring harness (Combination switch - Retract- able headlight) Repair wiring harness (Retractable headlight - GND) 1. ?urn the headlight switch on. 2. Measure the voltage at the following terminal wires of the combination switch connector. B+: Battery positive voltage Other Terminal Repair wiring harness (Combination switch - Retract- able headlight) Voltage Action B+ Check D terminal Repair wiring harness (Retractable headlight relay - Com- bination switch) D B+ Other Repair wiring harness (Combination switch - GND) Replace combination switch Gartner Banana

LIGHTING SYSTEM T Step 4 1. Turn off the retractor switch. 2. Turn on the headlight switch. 3. Measure the voltage at the following terminal wires of the retractable headlight relay connector. B+: Battery positive voltage Terminal F Voltage B+ Repair wiring harness I Other / (Headlight relay - Retractable headlight relay) Action Check B terminal Other B+ Go to Step 5 Check D terminal Repair wiring harness IGIB+l (Retractor relay - Retractable headlight actuator) I 1 I Other I Replace retractable headlight relay 1 Step 5 Measure the voltage at the terminal wires of the retractor switch. B+ Other B+: Battery positive voltage Repair wiring harness (Retractable headlight relay - GND) Check G terminal 1 I I B+ I Check B and D terminal - - - Repair wiring harness 30A - Retractor I Termlanl Voltage Retractor switch B(W) Action Repair wiring harness (Retractor switch - Retractable OFF B+/ headlight actuator) 1 Other Replace retractor switch D (RN) ON B+ Other Repair wiring harness (Retractor switch - Retractable headlight actuator) Re~lafX retractor switch Gartner Banana

T LIGHTING SYSTEM d I Symptom: Retractable headlight actuator does not operate (One side). 45UOTX-092 Step 1 1. Disconnect the negative battery cable. 2. Retract the inoperative headlight fully by using the manual knob. 3. Disconnect the retractable headlight actuator connector on the faulty side. 4. Reconnect the negative battery cable. 5. Turn on the headlight switch and retractor switch. 6. Check the voltage at the C terminal wire of the retract- able headlight actuator connector. B+: Battery positive voltage Voltage I Action 1 B+ Other Go to Step 2 Repair wiring harness (Retractable headlight relay - Retractable headlight actuator) Step 2 Check for continuity between the A terminal wire of the faulty retractable headlight actuator connector and ground. Continuity No Yes Action Repair wiring harness (Retractable headlight actuator - GND) Check retractable headlight actuator (Refer to page T-51) Gartner Banana

LIGHTING SYSTEM T TNS RELAY Inspection Retractable headlight actuator 1. Disconnect the actuator link. 2. Disconnect the retractable headlight actuator connector. 3. Connect battery positive voltage to terminal F and ground terminal A of the actuator connector. 4. Check the motor operation when connecting battery positive voltage as shown. B+: Battery positive voltage I Terminal I I B+ I GND I Motor operation 5. If not as specified, replace the retractable headlight ac- tuator. Retractor switch 1: Remove the retractor switch. 2. Check for continuity between terminals of the switch. Retractable headlight actuator to raised position Retractable headlight actuator to re- tracted position I C D A A I Switch 0---0: Continuity Terminal B I D I F OFF ON 3. If not as specified, replace the retractor switch. Headlight switch 1. Remove the knee protector. 2. Disconnect the combination switch connector. 3. Check for continuity between terminals of the switch. 0 4. If not as specified, replace the combination switch as an assembly. 0 I 0 0 Passing Tail, Parking M: Continuity 0 0 0 0 Gartner Banana

LIGHTING SYSTEM Headlight relay 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. B+: Battery positive voltage - - - Terminal Step A I B c D 2 B+ I GND 0 I 0 I 0--0: Continuity Retractable headlight relay 1. Disconnect the relay. 2. Apply battery positive voltage and check for continuity between terminals of the relay. B+: Battery positive voltage . . - Terminal I 1 I l O 2 I I B+ I GND O--O : Continuity 3. If not as specified, replace the relay. Gartner Banana