Sorry for adding this warning Bigdogguru: Pin 10 of the ULN is a common connection to all the internal catch diodes and should be connected to the same supply voltage as the relay. I'm just stating this so the original poster doesn't treat it as a 5V supply pin which can have disastrous consequences. If he is using 12V relays, connect pin 10 to the same 12V line.
Sorry for adding this warning Bigdogguru: Pin 10 of the ULN is a common connection to all the internal catch diodes and should be connected to the same supply voltage as the relay. I'm just stating this so the original poster doesn't treat it as a 5V supply pin which can have disastrous consequences. If he is using 12V relays, connect pin 10 to the same 12V line.