| | BMW 318I 1986 SI Board Battery Problem
I have had the battery off on the BMW to charge it as I only use the car now and then. When I put it back on I noticed the Rev counter and Economy gauge was not working. I have read that this is due to the batteries either need changing or they are flat on the SI board.
Can any one tell me if they will recharge themselves now that the main car battery has been charged,
Many Thanks in anticipation of any help.