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Another thing I noticed today while putting it back together, the terminal pointed out in first picture is #5 on cluster plug. The other side of Gen 1 light goes to #8 on cluster plug, thinner brown wire that is shown in schematic, that goes back to [I think] brown wire that plugs into alt 1.

Just had yet another truck w Gen 1 problems. This one had been faintly lighting GEN 1 LIGHT w heater blower on. After repairing Alt, noticed heater blower fuse melted but not blown. This may show that those of us with the heater/Alt 1 thing should pay more attention, even if alt still...

'can you show us that?' Can't show you on that schematic, but I know the alt 1 is involved in blower circuit. On my 1st 1008, replaced the#1 alt a couple of times before I figured the heater blower was involved. Was also blowing heater fuses. Replaced blower resistor(which looked ok, but...

The #1 alt circuit is routed through heater motor speed selector resistor as well. Heater motor fuse must be good, The resistor ( the four pronged plug on firewall next to the blower motor) must be good and not grounding to body. If your alternator tests good, but your heater motor does not...