ALTERNATOR TEST 3: Checking The Alternator Fuse
Your Honda Civic will have a fuse box under the dash, and in this fuse box is another fuse that the alternator needs to start charging the vehicle.
This fuse is usually a 15 amp plastic blade type fuse. Consult the label on the fuse box cover to find this fuse or check out your Owner's Manual if the cover is gone or if the cover doesn't have this label.
Reconnect the battery to its negative battery cable, that you disconnected in the previous test.
Locate the alternator fuse, which will be located in the fuse box in the engine compartment.
Once you have located the fuse, remove it and check that it's not blown.
If it is blown, replace it with a new one and repeat ALTERNATOR TEST 1.
CASE 1: The fuse is NOT blown. This is good and let's you know that the alternator has all of the power sources it needs to charge, but since it isn't, this result also let's you know that the alternator is bad and needs to be replaced.
CASE 2: The fuse IS blown. Replace the fuse with another of the same amperage rating and start the car and check to see if the alternator is now charging the battery by repeating ALTERNATOR TEST 1.
Symptoms Of A Bad Alternator
The most common symptom of a bad alternator are:
The Charge Light (also known as the Battery Light) will be shining nice and bright on your instrument cluster.
Whenever you turn on the headlights (night driving), they glow very dim.
The car won't crank, but when someone helps you to jump start it, your Honda vehicle easily starts.
You have to constantly charge the battery or get jump starts after which the vehicle only runs for a few minutes and stalls.
Related Test Articles
Honda vehicles are some of the easiest vehicles to work on, I know, my brother has owned one since 1991 (with 300,000 miles on the original engine and transaxle and still running great!) and I've worked on it quite a bit (in all fairness it's all been mostly maintenance) and not to mention that I also work on them as a professional automotive repair technician. If you want to see/read some of the other articles I've written about these cars in this web site, check out this index: Index of 1.5L, 1.6L Honda Test Articles.
Here a small sample of the tutorials you'll find in the index:
- How To Test For A Blown Head Gasket (Honda 1.5L, 1.6L).
- How To Test The Fuel Injectors (Honda 1.5L, 1.6L).
- How To Test The Starter Motor (Honda 1.5L, 1.6L).
- How To Troubleshoot A No Start (Honda 1.5L, 1.6L).
- How To Test The Ignition System -Honda 2.2 and 2.3L 4 cylinder engines.
If this info saved the day, buy me a beer!