Trying to decode the four terminals on the back of a VDO pyrometer gauge. They read 1 2 + - this does not include the lamp. Bob wagner posted this site http://www.egauges.com/Inst_PDF.asp
but I wasn't able to open it. Does anybody have old directions from thiers.
but I wasn't able to open it. Does anybody have old directions from thiers.

Last edited by a moderator: