I have 1999 Cadillac caters and it has three cooling fans none of which are working where are the relays or fuses for them located?

SOURCE: 99 cadillac de ville

the coolant temp sensor is at the rear of the engine and is a "bad word" to get to. the 3 relays are at the bottom,under the fans. if you remove the driver side fan out of the way( 2 10mm bolts holding the fan) you should have good access to them. they do have locks on them and may be tricky to unplug. there is a 7/16 nut holding the relay plate down. remove and it should be easy to remove them.

SOURCE: Cooling fan relay on a 1992 Cadillac Deville

Left Hand Side Of Engine Compartment On Relay Bracket

SOURCE: 1992 Cadillac Coupe Deville blower fan runs all the time

The BLOWER MODULE is located on the A/C EVAPORATOR housing located UNDER THE HOOD passenger side firewall. Has 2 electrical connectors. Mounted with 4 screw bolts.Hope this helps

SOURCE: cooling fans not working

you pcm has an open fault it seems to me. Try a used car lot that deals with Cadillacs for most of these used car lots are mechanic owned from the get go

SOURCE: Where are the cooling fan relays for a 1998

Are you sure that you don't mean the cooling fan control module? It should be located up front next to the cooling fan. It is square shaped and has a long square shaped plug going into it. Reads the temperature of the coolant and passes the information to the engine control computer (ECC). The ECC receives analog information and signals the cooling fan switch to cycle the cooling fan on or off, as required.