I am having trouble with my '91 Miata wipers. They do not work at all on low or medium, and high makes them go, but jerkily. I am I looking at a switch, motor, what? Please help!! Jake Same Problem, wipers only work on high. Inter. and low worked the week before. I can almost hear a buzzing noise when I first switch the wipers on behind the dash. Any help would be greatly appreciated!

This is a useful wiring diagram. I would say try swapping the relays over first and see if Low Beams now work and High Beams don't.

Other possibilities are two failed bulbs, or a broken connector. A good test meter should be able to trace this.

https://boostedmedia.net/automotive/videos/tech-videos/mx5-miata-headlight-wiring/


It does appear to be a known issue

https://www.google.com/search?q=2013+mazda+miata+no+low+beam+headlight

This suggests the combination switch

https://forum.miata.net/vb/showthread.php?t=531436

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Just replacing parts isn't the way to fix this problem , viewing wiring diagrams too see what all is involved in making the wipers work is . Then using a digital volt ohmmeter to test electrical circuits . Also looking at factory service info. to see how it's suppose to work.
Free wiring diagrams here http://www.bbbind.com/free-tsb/ Enter vehicle info. year , make , model an engine size . Under system click on body & accessories , then under subsystem click on wiper/washer . Click the search button ,then click the blue link. Looking at the wiring diagram i see two fuse's an two relays that are controlled by the BCM - body control module . Also hooking up a scan tool that can read BCM DTC'S - diagnostic trouble codes could be helpful . The wiper switch is a input to the BCM - the BCM will energize the relays to turn on the wipers.

Wiper/Washer System Components
The Wiper/Washer System consists of the following components:
• Windshield wiper/washer switch
• Body control module (BCM)
• Wiper 1 relay
• Wiper 2 relay
• Wiper diode
• Windshield wiper motor
• Windshield washer pump
• Windshield washer nozzles
• Windshield washer solvent container
• Windshield wiper arm and blade assemblies
• Windshield wiper transmission
• WIPER/SW 10A fuse
• WIPER 25A fuse

Wiper/Washer System Description
The body control module (BCM) controls wiper motor low speed operation. The washer pump and high speed operation are controlled directly by the wiper/washer switch. The windshield wiper/washer switch supplies voltage on the signal circuits to the BCM for windshield wiper/washer operation. When WASH, MIST, DELAY, LOW, or HIGH is detected, the BCM energizes the wiper 1 relay by suppling voltage to the relay coil. This allows battery voltage from the WIPER fuse to flow through the relay switched input then through the contacts and out the relay contacts to the wiper 2 relay switch contacts. Since the wiper 2 relay switch contacts are normally closed to the low speed circuit of the windshield wiper motor, the motor will operate at low speed.

DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3715 05: Front Wiper Relay Drive Circuit Short to Battery or Open

Do you know how to do electrical testing ? Here is diagnostic trouble flow chart .You will need a wiring diagram . Go to http://www.bbbind.com/free_tsb.html free wiring diagrams . You can see basic automotive trouble shooting videos on you tube if you are not familiar with this .
Wipers Low Mode Inoperative, High Mode Operates

2
Disconnect wiper motor connector C1.
Turn the ignition switch ON.
Set the wiper switch to LO.
Connect a test light from wiper motor connector C1, terminal B, to ground.
Is the test light on?
--
YES - Go to Step 6
NO - Go to Step 3

3
Inspect for a poor connection or an open in CKT 91.
Is a poor connection or an open present?
--
YES - Go to Step 4
NO - Go to Step 5

4
Repair the poor connection or the open in CKT 91.
Is the repair complete?
--
Go to Wiper/Washer System Check
--

5
Replace the wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column -Tilt.
Is the replacement complete?
--
Go to Wiper/Washer System Check
--

6
Connect a test light from wiper motor connector C1, terminal C, to ground.
Is the test light on?
--
YES - Go to Step 10
NO - Go to Step 7

7
Inspect for a poor connection or an open in CKT 95.
Is a poor connection or an open present?
--
Go to Step 9
Go to Step 8

8
Repair the poor connection or the open in CKT 95.
Is the repair complete?
--
Go to Wiper/Washer System Check
--

9
Replace the wiper/washer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column -Tilt.
Is the replacement complete?
--
Go to Wiper/Washer System Check
--

10
Inspect for continuity between wiper motor connector C1, terminal A, and connector C2, terminal B, using a J39200.
Is continuity present?
--
Go to Step 12
Go to Step 11

11
Repair the open in CKT 196.
Is the repair complete?
--
Go to Wiper/Washer System Check
--

12
Inspect for a poor connection to the wiper motor at connector C1.
Is a poor connection present?
--
Go to Step 13
Go to Step 14

13
Repair the poor connection at wiper motor connector C1.
Is the repair complete?
--
Go to Wiper/Washer System Check
--

14
Replace the wiper motor. Refer to Windshield Wiper Motor Replacement .
Is the replacement complete?
--
Go to Wiper/Washer System Check
--

Faulty switch

sounds like an electrical problem with the wiper switch, lever, or stalk.

stalk
switch lever
helicopter wiper

It happened to me, both low beam filaments in both new at same time (happens a lot so I'm told) The earths are in a stoopid place under the left headlight.

Hi, They are connected look at fuse's this may be the problem. Please leave me feedback, Malcolm Campbell.

replace the AC blower motor speed control resistor, it is burned out

sounds like the wiper switch replace that it should work.

yes it will get worse-yes they can stop working all together-you must replace the arm on which the switch is attached connected to steering column- get a used one from junk yard and a book at library