Reply to "Fluidynine radiator temp sender"

I'm not familiar with the wiring harness you're using, but I am familiar with the relays themselves. Terminals 85 & 86 supply the low current coil circuit that activates the relay contact. Terminals 30 & 87 are the load carrying switched contact connections.

Install a jumper wire between the terminal 85 of both relays. Supply 12 volt power to one terminal 85 of one of the relays. The wire for this supply does not need to be heavy gage, and it should have a low amperage fuse protecting the circuit. I would suggest using the oem fan circuit to power these relay terminals. The fan circuits are fused at the Panteras fuse box, and should be switched by the ignition switch, which will provide a convenient way to prevent the fans from running when the motor is shut off.

You are correct about terminal 86, install a jumper wire between the terminal 86 of both relays, and then run one wire from one of the terminal 86 connections to the temp sender connection.

The wiring supplying power to terminal 30 should be heavy gage, an individual wire for each relay, and each wire individually fused. These wires should be fed straight from the battery, bypassing the Panteras wiring harness.

Terminal 87 of each relay will then supply one fan each.

your friend on the DTBB