... the GP fuse fails after a short, or wear, not just from time... actually, the GP's pull less amps the longer they are on... to a point, so the 80 amp fuse will likely handle extended glow times easily.

I've had GP controllers do weird things to the car's charging system, one even caused the starter to engage whenever it was in the Glow position...
if the harness out of the pic gets good charging, AFTER the 45 seconds have elapsed, you have a bad controller.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!