To test the igniter on a 1994 Toyota Corolla remove the ignitor for the distributor. Using an ohmmeter check to see if it reads the proper voltage. If there is to little replace the unit.
Remove it and bench test it or bring to auto parts store they can test it for you
most of this problem is ignition coil fail, you can test it by exchange with other one.
You should in the UK, as your car will fail the MOT test if your horn does not work.
Bad spark plug? Bad plug wire? Bad valve or piston - do a compression test
Call Around; Find A Radiator Shop or A Mechanic That Can Pressure Test Your Radiator. This Should Help
Fill Radiator. Start Vehicle Check For Leaks, Find Area Of Leak If Any. Resumbit With More Information. Or Have Radiator Shop Do A Pressure Test On The System .
A pressure test is done to locate a leak if you can't visually see where it is coming from.
I WILL TELL YOU TO REMOVE THE RADIATOR AND BRING IT TO A RADIATOR SHOP TO MAKE AN HYDRO TEST ON IT THEN YOU WILL KNOW WHERE IT LEAKS I had mine pressure tested without removing it.
Some states test cars for pollution compliance by connecting a reader to the vehicle's OBD-II port. Your 1990 Corolla is exempt from OBD-II testing because you don't have an OBD-II port - they first came out in 2006.
If you suspect a problem, radiator shops can run a "flow test" after you remove the radiator and take it to them. If you don't want to remove and replace the radiator, they'll also do that part for you.
Remove The Radiator And Have A Radiator Shop Test, And Flush It.