After a little more testing this morning, it does cut off power to the GP's about 40 sec after they turn on.
I have four of the five old GP's out now and 4 out of 4 have tested good, they glow. This does not help my hard starts issues of late. The "D" fuse in the fuse box did not look to good and I have changed it as well this morning, is that the fuse for the GP relay? I have lost the paper from the back of the cover with the fuse info on it.

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1985 300D burning WVO using 26 FPHE, half gallon heated fuel filter,glow plug heater,home made injection line heaters. Home made cold air induction. ALDA full out.
2003 F350 7.3(the last of the great motors)
1987 Paint Horse-non running too, just walks!