Yes, you should have power going into it.
If you have power at the relays, but no power at the resistor, there is a short in between. If you look at the diagram I sent previously, power goes from ignition to Power Hold Relay. Then it splits in two, One side goes to High speed fan relay, then the resistor, then to cooling fan motor. Other side of the relay is the switch that is fed from the PCM. The PCM gets its signal from the Cylinder Head Temp sensor and the A/C pressure switches.
Second side goes from ignition to power hold relay to fan relay. From there it goes to the resistor and then the fan motor. There are only two places that both fans feed. That is the power hold relay and the resistor, besides the connections. Now you said you have power at the relays? Did you check them? If there isn't power, the power hold relay could be the cause. If you have power at both relays and not at the resister, then there is a harness or connector problem somewhere.
Here is a Cooling Fan diagnostic chart that gives voltage and resistance checks throughout the circuit.
Here are some harness location sheets so you can find the connectors on the harness and you can check for voltages along the way.
Here is the diagram again for the circuit for what I was referencing above.