Make sure that you have +12 volts on BOTH sides of the fuses. Key needs to be in the run position.
If you have a '71 car, the fan relays are located in the relay panel mounted above the passenger's foot well. There is a nylon connector (actually there are three) adjacent to that relay panel that could have a bad connection.
If the fan relays are mounted on the front trunk bulkhead by the radiator, the relays are fed with a pink wire that is continuous from fuse #11. There should be a pink wire jumper between the two fan relays.
There is a second version of the front mounted relays that will have a pink wire from fuse #11 to one relay, and a second pink wire from fuse #12 to the second relay.
John
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.