Hi George,

Your comment about early and late senders got me wondering. I’m an Alpine guy … the same temperature sender was used for Alpines from series 3 to 5. I am assuming the Tigers used the same temperature gauges as the series 4 & 5 Alpines. Those work based on thermal heating. If the same temperature gauges were used on Tigers, the VDO part should work as I described. You also need to have a voltage regulator in place. An original voltage regulator cycles the power on and off to generate an average power that is equivalent to a constant 10V. Or use a use a modern solid state voltage regulator that puts out a constant 10V DC.