Well I got an update. I checked the battery voltage under load from the glow plugs and it was 10.9 (down from 11.9 not under load). I also tested the voltage coming to the Glow plug relay (while under load from plugs) and it is 9.9, the same as the voltage at the glow plugs when they are under load. It seems like I'm losing a volt or so between the battery and relay. Does this indicate anything. Does a 1 v drop in voltage under load indicate that my battery is no good, or maybe just undercharged? Thanks for the help

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'85 300td Frybrid WVO Kit