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You probably have relay rack problems. When the wires hooking in to the relay sockets overheat (for whatever reason), they can cause the socket to deform and the female spade connectors no longer are locked into the socket. Not a problem until you remove a relay and then replace it (it may even be a result of a replaced relay not being fully plugged in). One or more of the wires will make a poor connection, create more heat, etc. until the insulation and plastic melts and smokes. This happened to my '94 940 with the headlight relay being the culprit. You can pull the rack out of the console and look underneath for any questionable connectors. You can use some needle nose pliers to slip the wire connectors back onto the relay spades to make a good connection or you can see if the dealer has a socket replacement. I went the cheap route and it has operated without further incident for years. I just need to remember to pull the rack if I ever have to replace a relay again. Check it without further delay, you don't want an overheated wire causing a fire in there.
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Bob K
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