Feature Review Hopkins Tow Doctor Vehicle End Test Unit Video

The factory trailer brake controllers are not good options for trailers with electric over hydraulic brakes. There are adapters that you can use to be made compatible, the HydraStar Electric Over Hydraulic Actuator Adapter Module part #HBA-CAM but…

We do have a tester for the trailer side of the wiring with the part #HM50928. You'd plug your 7-way into this and it will tell you if all if all of the functions are good.

If the brake controller appears to working properly and the brakes of your electric over hydraulic setup are still not applying that would lead me to believe that the problem is on the actuator itself. Does the actuator cycle on to build pressure…

It would not as it's only really designed to see if voltage is present. The new Ford trucks need a specific amount of load on the circuits to activate the 12 volt circuit which is pretty annoying. If you are looking for a way to bypass that…

The replacement unit, #4010509028 is a replacement for Tow Doctor part #HM50928. It looks like the Tow Doctor version you ordered is #HM50918. The difference is the HM50928 has more features. To test the brake controller output someone will need to…

Thank you for your purchase of the Hopkins Tow Doctor Vehicle End Test Unit #HM50918, and I'm glad you are enjoying it! Hopkins doesn't make a version of the 7-Pole, Round-Pin Adapter #HM50944 with a longer wire lead, but you can…

You can still use axle #T3584F-EZ-8974 if the spring seat centers match up like you said. The hub face to hub face measurement is only off 1/2 inch on each side which isn't going to cause you any problems.

It sounds like you're trying to find a replacement axle for your trailer. In order to do that you'll want to also take into account the width of the tires/wheels you intend to use, along with the spindle length. With this in mind, you…

You have discovered the "dirty little secret" of trailer wiring: wire colors are not a consistent and reliable way to figure out what each one does! But it is easy enough to check this simply by applying 12V power to each circuit…

While they may appear similar, the 2019 BMW X5 equipped with an M-Sport package has a different rear suspension than other 2019 BMW X5 models, therefore the designs of the hitches themselves are different. It sounds like you're looking for…

For your motorhome pulling your 1998 VW Jetta, I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit #RM-15267. This system will work with a 2 or 3 wire system, so it will work well on your Jetta. I've attached a few videos…

The center pin of the 7-way is wired for a reverse light circuit. The Blue Ox wiring 7-way to 6-way has to do with 7-way trailer wiring circuits and reduces to the 6-way input wiring for the tow vehicle. The 7-way is labeled as open at the 7-way…