Is the wiring diagram you're using for the 2003? I've attached a wiring diagram for the 4-cylinder rad fan system that's somewhat different in layout, and might have different connecting pin numbers.
I am the original owner of this car and I remember the fans coming on after I would park the car on hot days or long drives.
If the car is parked with the ignition key at ACC, OFF, or out altogether, the fans should not run. While I suspect this is just a question of clarification, if indeed the fans did run, I'd be suspicious.
(The reason the fans should not run is that the relay energizing coils are powered from the ON (or IGN) terminal of the ignition switch. With the switch at ACC or OFF, there should be no continuity through the switch to the relay coils.)
I can get the fans to turn on by pulling the relays and jumping the high current side.
Referring to the diagram I attached, I presume you're jumping between pin 8 and 9 of the Main relay, and pins 21 and 20 of the sub-fan relay. Is this correct? If so, that's a good test of the main fuses, wiring and fan motors. (At the bottom of the attached page there's diagrams of the connectors F66 and F28 with their corresponding pin numbers.) As the two main fuses at F27 are always powered from SBF-1, jumpering the high current side would turn the fans on even with the ignition switch OFF.
Incidentally, the two main fan fuses are shown in the diagram, and in the Owners Manual, as 20 Amps, rather than 30 Amps as you mentioned in the first post.
I just cant measure any voltage on the control side of the socket in the fuse box.
Can you identify in the attached wiring diagram where you're measuring (connector and pin numbers)?
Pending your clarification, I'll jump ahead and presume you're not finding any voltage at pins 5 and 7 of the main fan relay, and pins 24 and 22 of the sub-fan relay. Are you measuring with the key at ON? Otherwise, there's no power to fuses 17 and 18 and therefore no power to the relay coils.
Fuses 17 and 18 power other functions in addition to the two rad fan relay energizing coils. For example, fuse #17 also powers the cabin heater/AC fan motor relay. A quick check for power at fuse #17 would be to turn the ignition switch to ON and turn on the heater fan. If it works, then fuse #17 is powered. Similarly, fuse #18 supplies the power window relay, so with the ignition key at ON, if the power windows work, then the fuse has power.
Alternatively, with the key at ON (engine need not be running), there should be battery voltage at fuses 17 and 18. Have you checked at both sides of each fuse? (The mini-fuses have small openings in the back of the plastic case where the tip of a meter test probe can contact the fuse to measure voltage at both sides while the fuse is in place. There should be 12 V at both sides of each fuse, relative to ground.)
I actuated each relay manualy and they do close when I put voltage to the control side.
Good check -- to be sure the relays do activate when battery voltage is connected across the energizing coils.
Okay, so let's get things clarified so we're on the same page, and we'll go from there . . . There could be a problem with the engine coolant temperature sensor connection between the sensor and the ECM, but that's high on the list, at least not initially . . .
p.s. There's a pair of green connectors under the dash that, if connected (they're normally not), will cause the ECM to cycle a number of relays and solenoids, including the fan relays. This could be something worth trying.
This thread refers to them at post #14 and beyond, with a diagram of their location. Might be worth trying as it checks the rad fan system from the ECM on and avoids the need to rig up jumpers etc. If it works, and the fans cycle on and off (as long as the key is at ON), then pretty well all the downstream circuitry is good. The need then would be to find out why the ECM isn't turning them on when the engine temp rises.
Incidentally, do the fans turn on (one or both) when the engine is running but not "overheating" and the AC is turned on?