sorry that this post is lengthy, but i'm trying to answer all questions to someone in the know, before they have to ask them.
here's what i've ascertained so far. there are two radiator cooling fans. one draws +/-2.5 amps of current under load, the other draws +/-8.5 amps. the 2nd one seems a bit excessive so i'm hoping that someone can verify if that's normal or not. the amount of heat generated inside the relay box in the right front corner of the engine compartment is enough to thaw and heat my lunch. i replaced all of the 3604 relays (the square ones) because they looked really tired (brown tint on the gray housings). one of the relay contacts (30/87?) of the higher amperage fan is bubbled on the plastic where the relay plugs into the board next to the other relays. as a result, i believe that relay is functioning intermittently thereby causing my overheating problems. what i would like to do is to bypass the OEM relays and extend the 10 ga. wiring to a couple of 30 amp Bosch relays that i would mount directly behind the r/h headlight where there is much less heat. i went to the boneyard and tore apart another deville to see exactly what i'm dealing with, and i grabbed several feet of the l.blue, white, and gray wiring to keep everything uniform. there is a black 10 ga. also that appears to go to a ground distribution. so one fan has a l.blue and the black which goes to ground. the other fan has a white and a gray, both 10 ga..
here's where i'm stuck: on the fan with the white wire and gray wire - what is the current path of each wire? which is the negative, and is the negative switched as well as the positive for some reason? the diagram that i saw online was just a bit confusing. i'm hoping that an expert in this area can clarify this before i start my little project. thanks in advance.