With 2pcs - 4pin relays, I can test both normally open and normally closed setups easily.
EHDIS 5 Packs Car Relay with Harness Truck Motor Heavy Duty 5-Pin 80A 12V On/Off
What stands out about this DNF unit is its consistent shape that fits standard sockets without fuss.
A nice touch is the, and Weasch relays feel reassuring in use.