20 Most Recent 1992 Mazda MX-5 Questions & Answers

check the headlight relays , Check for possible faulty light stalk switch also. Dash lights may fail with this possible cause. Check fuses

turn signals. (blinkers)? its marked TURN in the fuse box. the 92 operators guide has but is lost. sure. to go deeper, and FSM book or alldata.com login.

With any luck, just your main fuse. This is under the hood. Look on the left hand side toward the windshield washer reservoir.

You can pull the fuses one at a time and look at them.You will know the bad fuse when you see it.

With Volt meter in the DC mode check battery level, should read 12.4 thru 12.6 volts start the engine, voltage should be between 13 and 14 Volts . If voltage do not increase, bad alternator. Or could be broken or slipping fan belt.

go to autozone ,advanced auto or pepboys and they will check your charging system-the detailer may have knocked a wire off the alternator - they should also look at it for you-Denny

Go to Autozone.com for a free fusebox layout and chassis wiring diagram. Just register your car on the site and you can get this info.You are probably looking at a high beam relay or the stalk switch. If you look at the wiring diagram, the flash to pass circuit likely bypasses the Relay for the high beams. Since the Relay is cheaper than the stalk, try switching the horn relay into the position of the highbeam Relay to test.You can try to may the horn work with the switched relay or do it with the lights. Only switch the Relays if they have the same part #. If the relays are good, the stalk should be bad.

Have the TIMEING BELT checked out, Could also be the fuel pump

Hi,
Sounds like a tune up is in order.
You can mask the problem by changing the fuel filter and spark plugs.
Also there is a small adjustment screw at the throttle linkage. Open the hood and stand close to the battery. Have someone rev the engine and look for the circle or half circle looking spring like mechanism.This is your throttle. Take a small screwdriver or other wrench [ some have different adjustment screws] and simply turn the screw you will see as the adjuster in about 1.4 turn until you are happy with the idle.

when my mazda mx5 is warmed up the engine idles at 800 revs after about 20 seconds the revs drop to 400 revs,after 5 seconds they pickup again to 800 revs,this pattern is continuous.HELP!!!!!

If you haven't already, this is what a service consists of.
Oil and oil filter change, spark plugs and wires, cooland flush, transmission flush/gear oil flush, cabin air filter, air filter,fuel filter, timing belt and tensioner pulley and tire inspection/rotation.