Good Day everyone . One small question if I may. Sounds like this is an regular issue with these hondas. Suddenly All dash lights , door open, brake and charging lights on. Battery new. Car charging at 13.9 volts.

After replacing .the Alternator twice , Rockauto sent out another unit with no questions asked, they didnt even want the first one back . Now i have two. The same issue is still there.All dash light still on. everything works as it
should on the car. What will happen if i run it the way it is. Personally I dont care how many lights are on as long as its running fine , doesnt overheat and gets me back and forth to the train station. 2 miles a day.

What will happen if i leave it alone , it is charging at 13.9 volts. Do i need to carry a fire extinguisher? Thanks everyone. John S

 

With so many systems affected , have you tried the main relay?

 

Hello, what will the main relay control? Every system in this car works as is should . Wouldnt at least something NOT work if the main relay was NG. If i removed all the lightbulbs that are lit on the dash, you would not even know there is an issue by the way the car operates and drives. What does the main relay do?

Thanks, John S

 

You are going to look for a junction point in the diagrams, covering all those systems. The main relay, supplies the power for everything under the dash. A common junction point for electrical disturbances in multiple systems and designed to blow first. Suspecting a cross short, turning the instrument warning lights on. Mains relays are $50-60 in parts. If you know somebody swap in a known good one. The relay is a circuit that can fail in many different ways.

Happen to put any sheet metal screws through the ribbon cable going to the cluster? No, that would be silly. Nobody does that.

Last thread, a guy broke the connector. That would cause a cross short.

 

Thanks for the reply. I bought this car from my friends mother who bought it new from the dealer. It had 52,000 k on it. was mint condition. $3000.00 . She actually ordered another honda from the same dealer with a 5 speed as well and this one now has 4,000 on it in 5 years. Anyway, I havent drilled into this car at all. I had to buy it for 3000 and it now has 160,000 flawless miles on it. Rockauto sent me 2 bad alternators and would not send out a third unit. They want at least one unit back which i sent out. When i get the 96.00 credit I will replace the Alt one more time from a different vendor. DB electrical has NEW units for 85.00 . If that alt has no effect , I will change the Main relay. If that doesnt help, I will drive it the way it is.. . Thanks for the help sir, John S

 

OK , 2 yes TWO defective alternators received from Rock Auto. They only wanted ONE unit back. I ordered another unit brand new , $85.00 for my Honda from DB Electrical.com
Installed today this morning , and BOOM....all lights OUT on the dash . Works as it should putting out 14V.
Thank you for the help. Best, John

 

Although the OP appears to have already solved his problem with a good alternator, this thread includes some misinformation which may mislead someone else searching through the forum threads in the future.

Just fyi: The main relay controls power to the fuel pump and supplies power to the fuel injectors. The main relay does not supply power to everything under the dash.

The main relay would not have caused symptoms the OP experienced.