Review on H4 Headlight Relay Harness Kit for Toyota Pickup & Tacoma - Solve Dual Ground Problem by Jerardo Phi

I bought two sets of these straps. Both relays do not have a jumper on the same harness, which is very important for long-term operation. It is essentially a thick wire that provides the main transmission of electricity to the relay. Without it I don't think the relay can handle that many amps or long term use. Virtually nothing in these harnesses is protected from the elements. Don't be surprised if years later your headlights suddenly go out at night. If you know what you're doing, it's not that difficult to caulk it in a couple of places so it lasts longer in terms of corrosion. Since both headlights depend on this one relay harness, this can be a bit risky. mainly due to poor build quality. Other than that, these straps work as advertised, at least when first installed. The next step up in quality for something that does the same job is hundreds of dollars. Too bad that there is nothing in between this price range.