Marlin you hit the nail on the head. When I went back into the fuse block for a long afternoon I discovered that in fact #12 was blown (just barely). When I checked last night the lighting was not that good in the garage, even with the drop light. I replaced #12 today and all was back to normal, kinda. I had forgot that #11 has always been blown since I got the car years ago. I have one fan relay running from the ignition "on" position wire and the second fan relay from the temp switch in the radiator and to a manual switch if I get nervous about the temp. My break lights work fine but I believe that a previous owner disconnected the seat belt warning system and could be the reason for #11 blowing. The serge as you say when I high rev'd makes sense. Any ideas on the reason for #11 blowing? Must be the way the seat belt warning system was disconnected.