http://www.odyclub.com/forums/showthread.php?s=f68dff7d552bbb0bd59c66d0d8be4b5b&threadid=23429
There is no back light for the clock. The clock numbers are actually LED's - there is no way to replace them - the entire clock will have to be replaced.
Original equipment part for brake light replacement on 2000 Honda Odyssey EX is: 7443 W21/5W STANLEY 12V 03U E4 2DW
Go to www.odyclub.com and search the forum for this subject. There are several good threads that descibe in detail, with pictures, how to replace the light including Radio Shack replacemnt part number as well as led replacement possiblity.
Honda odessy abs light on when driving
It indicates transmissions problems. Had this happen at 103,000 km on our 2002 Honday Odyssey and had to replace the entire transmission.
This site gives step by step instructions here - http://www.marcelk.org/archives/71
Honda
remove trim, remove clock, remove clock light harness, and remove and replace clock light bulbs
The clock light is an integral part of the clock and is not replacable by itself
How do i remove the tail light on a 2005 Honda odyssey to rpleced the light bulb.
See sources and related links below for 2003 Honda Odyssey light bulb lamp list.
There is a problem with the transmission and you need to get it to either honda or a mechanic.