wiring diagram for 92 512 tr

While recognizing that a proper wiring diagram for your car would be best, Ferrari has used the same identical radiator fan circuitry in all cars I've analyzed. That is 3 relays and a thermostatic switch to control the fans. At a given temperature, the thermo switch at the radiator activates the coil on 2 relays causing both fans to turning on together. The ac fan speed switch causes the third relay coil to turn on one of the fans independently regardless of water temperature.

There's several reasons for fan failure, components which include fans, relays, thermo switch and fuses plus wiring which includes the thermoswitch ground. Troubleshooting by listening for relay clicking which should accompany fans turning on.

Assuming the fuses are good, short across the thermoswitch expecting to hear two relays click and have both fans turn on. If the fans do not work and relays did not click, short each wire on that switch to ground as lack of ground is always suspect.

Turn on the ac temp switch expecting to have one fan to run and to hear one relay clicking. You can do this with ignition in run but engine not running

Hope this has been helpful and if you find a diagram, perhaps you can share it.

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this may not be your problem but these two items draw ALOT of current . if the fan relays ore still in your fuse box you may want to check out the fuse/relay box out for burnt board pins. inside. good luck