RV Battery Disconnect Switch Not Working

RV Battery Disconnect Switch Not Working- The Fixing Guide


Well yes, if the disconnect switch in the battery isn’t working, it’s a big issue. This is because this switch is what keeps your batteries in good condition. 

Moreover, this switch disconnects the house batteries when you’re not using your RV. So, if they’re not working, you should fix it.

So, why is the RV battery disconnect switch not working? And, how should you fix it? 

Turns out, disconnect switches can fail due to the fuse or any wire not working in the circuit. But, don’t worry, it’s not the end of the world if the switches stop working. 

And besides, we’re here for you as we’ve compiled a step-step procedure on how you can fix this issue. 

Also, you can even learn a lot from the FAQ session at the end of this article as well. So, you don’t want to miss it. 

Now, let’s begin, shall we?

The Fixing Guide

By now, you should know that the disconnect switch isn’t working in your RV. In case you might be thinking whether the fixing process is hard or expensive, let me tell you something. 

Well, the best solution for fixing disconnect switches is getting a new one. No, the process isn’t hard at all and neither is it expensive. Hence, you won’t have to break your bank in the process of installing another disconnect switch. 

Also, if you can follow the step-step procedure that we’re about to show you, you’ll finish it without a sweat. So, let’s begin. 


The tools that you’ll need for this procedure are available and inexpensive. You can collect them from any local shop or from the internet. So, let’s look take a look at them: 

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After you’re done, let’s look at how you can carry the step-step procedure: 

Step 1: Disconnect the Cables from the Battery

When you’re starting, make sure you have gloves and glasses on. This is because it’s essential to use safety when working with electrical equipment. 

After this, firstly disconnect the cables from the battery using a wrench. Moreover, you should disconnect the negative cables first and the positive cables second. 

Step 2: Clean the Battery Terminal and the Connectors

When you disconnect the cables, you can easily clean the connectors using a cleaner. You should also clean the terminals at this time. After you’re done, rub it using a paper towel. 

Step 3: Check the Water level

After you’re done cleaning, check the water level of the batteries. The water level will ensure the right power supply of the battery. The low power supply can cause issues like the air conditioner compressor not coming on. At worse, low battery power can even stop you from starting your ride. It’s essential that you use safety gear while taking this step. 

Step 4: Attach the Battery Disconnect Switch

Finally, attach the battery disconnect switch in the negative terminal of the battery. Also, make sure to tighten it to the terminal using the wrench. But, make sure you don’t over tighten the switch to the terminal.

Step 5: Reconnect the Cable in the Positive Terminal

Before connecting the cable in the positive terminal, make sure the lever of the switch is open. 

Tighten the cable on the positive terminal but don’t overtighten. Also, use the wrench for this function. 

Step 6: Reconnect the Cable in the Opposite End of the Disconnect Switch  

Connect the cable to the opposite end of the disconnect switch. However, make sure that the lever of the switch is still opened. Here, using the wrench, tighten the cable. 

Step 7: Lower the Lever of the Disconnect Switch and Check it

After you’re done with the above steps, lower the lever of the disconnect switch. This will establish a good connection. Following this, check if there’s a 12 volt DC power in the RV. 

Why Is It Necessary to Fix the Disconnect Switches? 

By now, you should know how you can fix the disconnect switches. But why should you fix them? I mean you can leave them just like they are now, can’t you? 

Well, the disconnect switches in an RV have a lot of value. If you don’t have them in your batteries, you’re missing out on a lot. So, let’s look at why is it necessary for you to fix it: 

  • Disconnect switches make sure that the batteries in your RV work well. 
  • Not having a disconnect switch drains away from the battery faster 
  • The parasitic loads like a clock, stereos, lights will drain away from the battery even faster. It also drains due to a gas leak detector and appliance circuit board.
  • Discharged batteries that aren’t recharged will be ruined long before it’s supposed to be. 
  • If you have a disconnect switch, you can use it to disconnect the battery from the RV. Hence, using the RV won’t discharge your battery. 
  • The disconnect switches cut-off power. As a result, electrical fires and theft won’t happen easily if you’re using your RV. 
  • Without a disconnect switch, there’s a high chance of short circuit damage. You might experience troubleshooting fans and several other electric-based components in your RV. 

RV Battery Disconnect Switch Not Working – FAQs

Question: Can a disconnect switch go bad? 

Answer: Yes, they’re switches and they can go bad at any time. 

Question: How do you test a disconnect switch? 

Answer: Go get a light of 12-volt and push that switch into storage. After this, disconnect a negative terminal of the batteries. Now, you have to hold the probe for the post and the clip on the cable. If the light glows, it’s working. 

Question: Can you keep the RV plugged in all the time? 

Answer: Yes, you can plug in the RV all the time. 


That’s all we have for you. Hopefully, now you’ll know what to do when the RV battery disconnect switch not working. 

Also, if you’re not comfortable around batteries, we highly suggest you get a professional to do it.  Moreover, even if you have a disconnect switch, always check the health of your batteries.