You can find the wiring relatively easily by creating jumper wires. . . The fans must pull the air through the radiator from the front of the vehicle to the back, that is a given. . . There should be two wires, just plug them from your battery to each terminal on your fan assy. See which way the fans turn, if they push/pull the air in the correct direction, then you know which is going to be your hot, and which is going to be your ground, if they go in reverse, then the wires are reversed. From here, assuming everything else in your system works, you can find how to connect them to your harness, either trial and error, one way, then the other, to find out the correct air flow, or use a meter or test light and find out which wire is hot, and which is ground. Something to keep in mind on these and particullarly being a product of mopar, is there will be either a fan relay, probably in the power distribution box, or a variable speed controller (behind the drivers side headlight assy, and connected to the body with rivets), make sure these are working also using a test light at the fan connector, if you don't have power with the A/C turned on, or with the engine warm, there is a problem with the relay/fan switch, or the control module, or the fan switch, which actually controls the fans after warm-up... The best way I know to get an idea, is find out if the fan works with A/C turned on, most vehicles the fan will always be on if the A/C is turned on. Good Luck, I am currently troubleshooting a '99 with that variable fan switch.
Scott
Scott, May 2006
