Good evening G and GREGG Well it looks like it is the battery. I changed that and now the sounds last after I take power off and much louder, Sounds are distorted when shutting down. Didn't notice when part of lash-up. Everything looked good and tight under the hood didn't see any pinched wires. Speaker looked good no flaking looked like new. Checked the voltage on old battery it was 1.3, on the new old stock battery was 2.4. I must have loaned out my battery chargers because I can't find them. This is the first time I had to replace a battery in a 3 volt system, had this spare for years. I'll try in a MU tomorrow. Think I should buy better speakers for these SD40-2 I have six of them.
Thank you everyone for your time
Clem k