EPAuto 30/40 AMP Relay Harness Spdt 12V Bosch Style - 4 Pack

I have used these for everything from upgrading headlights to electric chokes and even as a starter relay on an 84 Chevy truck and had no issues.The relays are sealed well so you don't have to worry about water intrusion in the relay itself. The included wiring is a nice bonus, but it is NOT sealed so water can still get into the connections. Also the wires that are included maybe on the small side for any sustained high current, certainly not suited for a continuous 30 or more amp load. Luckily the terminals are easy to remove from the connector so heavier wire can be installed and still look professional. The mounting bracket is a bit flimsy but holds the relay in place.For the price you cant hardly go wrong, certainly much cheaper than buying them at a local parts store.Update 10/5/23 Been using these for several years now and only had one failure so the relays themselves are pretty good, specially for the price. Just remember the included wires are NOT up to the task of a 30 amp load, even if the relay is.The wires are marked as 16awg which is OK for up to a 15 amp load, depending on the length of the wire used in the circuit and how much voltage drop is allowable.Have successfully used for electric radiator cooling fans after replacing some of the wires in the relay connector. Personally, I make new wires for the power supply side and the load side of the relay (terminals 30, 87 [& 87a if it is being used]) if the load is over 10 amps. Terminals 85 & 86 are fine since they are just used to activate the relay and that does not use much current at all. As always, make sure any hot wires are fused with an appropriate sized fuse for the wires and circuit load as close to the battery as possible. Relays are still 5 star, specially for the price.The wiring and connector would be more like a 2 since it is so far below the rating of the relay, but again, for the price you can't expect much. At this price point, you are lucky to get a connector at all.

I bought this set of relays so I could use one to run an electric fuel pump on my lawn tractor. The factory diaphragm fuel pump is tired and I didn't want to mess with it, so I bodged an electric pump with a relay to turn it on.I selected these because they came with the harness pigtail, they were relatively inexpensive, and the reviews were good. Those are my criteria when I buy non-critical parts to keep around. I don't want to spend the money on name-brand relays for non-critical applications such as this because an inexpensive relay will do the job just fine, and even if it doesn't, my lawn tractor is never more than 200 feet from my house.Would I use this relay on a critical system in my car, IE fuel pump? Only if I was in a real bind, and in that case I'd throw as many spares as I could find in the glovebox. Not saying these relays won't work (the one I installed is working quite well), but I have no idea what this company's QC is like or how good they will be in the long run.I suspect that most people who buy these will use them for non-critical applications-- accessories or lights on their car, adding a circuit, etc. For this they'll probably be fine, and if they're not, they'll be easy enough to swap out for something better. As for me, I'm glad I have them for little project like my lawn tractor. If I manage to use them all, I'll buy more.

great product,fast shipping,quality and quanity.

Good value, includes sockets that lock together for specific circuits - that was a bonus! It's easy to move the terminals to match your desired configuration using a jeweler's screwdriver. In addition, these relays are a good width so they can plug in to the linked sockets without interference.My only gripe is admittedly minor - these relays have a metal tab inserted for mounting purposes (you can see it in the photo). I would have preferred the tabs be included separately so I could insert the ones I needed rather than having to fight to remove extra tabs.The tab issue will not keep me from buying these the next time I need to create a custom circuit for one of my vehicles.

it works perfect and I haven't had any issue wit it.

I was rewiring the lights, electric cooling fan, and horns on my Alfa Romeo. These came with wiring that was heavy duty, unlike some others with light wires, and were easy to install. Had the expected terminal numbers for easy reconnection.

Had to wire up some lights on a truck, the relays worked good, were priced right, and arrived fast!

Adding dual30 amp circuits for electric fans, triggered by temperature on ground circuit. Works great. Will buy again.