After I replaced the original alternatorwithtwo differentNAPA alternators my battery light (on the dashboard) and my brake
light, also my open-door lights were and still are flickering while I am driving. They don't stay on for
a long time, maybe one secondat the most. They don't flicker when there is a load on it (lights on).So it seems like battery and alternator are okay. Any ideas of why the
lights are flickering this way? Thanks for any advice.[/align]99 Accord EX 6 cyl. 150,000 mi.[/align]

 

I recently had an experience w/ a harmonic balancer where the outer pulley separated from the rubber core connecting to the inner drive core which is driven by the crankshaft. Result was undercharging which led to failure to start. At no time did the alternator light come on. This is difficult to diagnose visually, and you would need to remove the drive belts and manually try to turn the outer pulleys. If you can rotate them against a stopped engine, the rubber core has separated. You can search my posts and find the problem I had w/i last couple of months.

Also suggest purchasing the Battery Monitor from Walmart (~$15) which plugs into the cigarette lighter socket and allows you to monitor battery voltage. It should generally be around 13-14 V under typical low electrical load conditions, and should never drop below 12V even w/ heavy load.

good luck

 

NAPA usually has a good rep, it is believed by many that OEM alternators should be used on Hondas, at least an OEM rebuilt.

 

I'm thinking more along the lines of a short in the dash.