quote:
Originally posted by brianl703:
There is a possibility that it's like a GM vehicle and the alternator light really is controlled by the ECU, either through a multiplexed data link (much like a LAN) to the instrument cluster or a direct connection to the ECU for the light.
IF that is the case though (I doubt it is--it would be a radical departure from how Honda usually approaches vehicle electronics), they should be able to use a scantool to command the alternator light on and off to see if it's responding properly to data commands from the ECU to make sure it's not "stuck on". If it were "stuck on", that would be a problem internal to the instrument cluster and generally those are not field-repairable so it would have to be replaced.
If the ECU were really commanding the light on, there should be a code in the ECU, which they can use a scantool to see, which tells them what the problem is.
EDIT: If it is indeed wired like a GM, any short in the connection between the ECU and the instrument cluster would affect a lot more than just the battery light...
