97 jetta cooling fans

[toodopey]

my 97 jetta has been overheating. i'm getting power across the thermo switch to the red/white wire, but the fans will not come on. if i jump the power from the red/white wire to the red/black wire, then the motor turns on, i don't know what to do to get this right. help?

[boschmann]

Which engine do you have? Where is this red/black wire, are you sure it's not red/green?

[toodopey]

jetta gt with 2.0 gasoline
it may be red/green but my haynes manual wiring diagram(which is a typical diagram) calls for red/black.
it looks as if the wires out of the thermo switch are red/white (for 95 degrees C) & yellow & red and smaller gauge (for 105 degrees C). However the wires on the fan motor are red/white for 95 and red/green or gray for the 105

[toodopey]

i'm thinking that the resistor for the low speed fan may be fouled, therefore the power from the thermo switch is not driving the fan. Like I said before I jumped the hot wire from the thermo switch to the high speed side of the fan and it runs.

[toodopey]

To complicate matters, I've found that when I jump the power from the therm switch to the red/green or gray side of the switch, that I get no power to the fan motor.

[boschmann]

Have you tried running 12V+ from the battery + to the red/white wire on the fan (keeping terminal 3 -brown wire ground) to see if you have low speed? Also, have you checked the fuses on the fan control module (left side of engine compartment by the battery)?

[toodopey]

Yes, I have put 12V to the middle terminal (red/white wire) and get no response from the fan. When I put 12V to the remaining terminal (red/green or gray wire) the fan runs fine.
As far as the control module fuses, I have replaced the fusible link & the 20amp fuse next to it is fine.