The first thing I did was verify the red and black wire pinout and as stated on other reviews the Red and Black wires are still switched. There's no way I could sleep knowing that I soldered a red and black wire together. So I popped them off and switched them all in about five minutes.

I may post some pics on how to bend the pins to remove the wire from the connector if you need to switch any wires, it's really easy.

Other than that it's a really great deal and I'll definitely be buying more.
Thank you.

So far I have installed 3 of these relays and everything is working perfectly. I am relying on these to run the off-road lights on my 04 TJ.

I used two of these relays to control a dual electric fan setup for my big block Camaro - one for each fan (labeled "L" and "R" in the attached pic). Before installing I switched the red and black wires in the relay socket (release the pins with a very small screwdriver) to correspond with the more traditional, red=power (pin 30), and black=ground (pin 85). Next I attached the relay socket housings together using the slots designed for this purpose. I then attached each red wire to an ATC blade-type fuse holder #16 AWG (purchased here on Amazon), using 20 amp fuses each in my case; then spliced the wires together and connected to a #8 AWG for the run to the power source. I spliced together the yellow wires (pin 86) and connected to my switched ignition source - through a JEGS adjustable fan temperature switch (#52125). I made a dedicated connection of the blue wires (pin 87) to each specific fan (connected to the positive wire of each fan harness). All the negative wires terminated into a #8 AWG wire - and connected directly to the frame.

Not sure why there were negative reviews for this product. These relays are inexpensive and work perfectly.

eh, they work, I haven't had an issue with any of the relays, but the switched side terminals in the harness are really too small. They're 18ga or smaller, and although you can probably get away with running that for a short length and then using heavier wire for the rest of the run it's really not right, and you don't want to do that for >20A.

I ended up popping he load side terminals out, going to NAPA and finding some crimp female spade terminals with the retaining pin for a harness like this, and crimping them on some 10 and 12ga wire appropriate to the application that I was using them for.

Very happy with quality. Worrying diagram was very accurate for my use. I don't know why other reviews complain of inaccuracies in wiring.

Good value too!