ELECTRIC CIRCUIT OF RENAULT 19 DIESEL

The problem is as follows: of the censor to activate the relay that activates the refrigeration water fan, two cables, yellow and white and those that enter the relay are the relay with 12 vy another brown that when joining it, starts the fan. If the two cable cables, let the fan start, but it does nothing and there is no current, so I think there must be a circuit or something between the censor and the relay.

Hello, forgive the bush but I think this is what you ask, but if not, I will try to help if I can.

Forgive but I have not been able to answer before.
I think this is what you want.
I don't know if you will see it well, if not, I can send it to you by mail, if you tell me where.