Well, I don't know that it necessarily must work, but there is a common fuse for sure and that's what I would check first. I need to go over to the mbca website and review my posts regarding this problem. I think Marshall Booth set me straight on this because I was asking about OVP relays and such thinking that might be the problem but this year 190D didn't have the OVP, as far as I can remember now.

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Kevin

1978 300D
1979 240D