How to Replace an Automatic Shutdown Relay

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Automatic shutdown relays are a big part of controlling and operating electrical functions and getting a vehicle to start and run. Functions that are operated through the automatic shutdown relay consist of anything from operating a window to running a fuel pump. A vehicle relies on automatic shutdown relays to prevent electrical circuit damage to wires and wire harnesses as well as to avoid application damage to lights, window motors, and fuel pumps.

When it comes to diagnosing a bad automatic shutdown relay, you should look for common problems like failure to start, inoperative headlights, broken air conditioning, and malfunctioning heater or AC blower. Many different car functions are affected by the automatic shutdown relay.

Part 1 of 2: Locating the automatic shutdown relay

Materials Needed

  • Owner's manual
  • Pliers

fuse box sample distribution box sample

Step 1: Locate the fuse relay section in your manual. This should be either in the index or table of contents.

The image in the manual should give a diagram similar to the above, and either label each fuse and relay function or number them such as above.

Step 2: Find the proper relay. Locate the broken relay by using the diagrams shown in your owner's manual.

Part 2 of 2: Removing the automatic shutdown relay

Material Needed

  • Pliers

automatic shutdown relay being pulled out by hand

Step 1: Pull the relay out using your fingers. Once you locate the relay you are going to replace, you can pull the relay out by using your fingers in most cases.

Using the pull with a light side to side rocking motion to get it out. In some cases you may need a pair of pliers to remove it. When using pliers, be sure to grip firmly without damaging the automatic shutdown relay plastic housing. Sometimes the relay will come straight out; if not, pull with a side to side rocking motion to work it out.

Part 2 of 2: Installing the new automatic shutdown relay

sample terminal locations and relay cavity connection patterns

Step 1: Install the automatic shutdown relay. Do this by simply pushing the new relay into place, paying attention to the relay connection pattern.

This is important so you don't bend or damage the terminal or connection. The relay should easily push right into place.

The automatic shutdown relay plays an important role in a properly functioning vehicle. When an automatic shutdown relay is overlooked during diagnostics, the cost is potentially disastrous. If replacing your automatic shutdown relay is something you would rather leave to a professional, please contact one of YourMechanic’s certified technicians to perform a replacement.


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Recent Automatic Shutdown Relay Replacement reviews

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YourMechanic Automatic Shutdown Relay Replacement Service

Average Rating

4.9/5

Number of Reviews

121,889

Rating Summary
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113,663
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Richard

19 years of experience
461 reviews
Richard
19 years of experience
Volkswagen Jetta - Wheel Bearings Replacement (Passenger Side Front) - Douglasville, Georgia
He is a very great and knowledgeable mechanic. He will go the extra mile just to make sure your vehicle will be running properly. 10/10 would definitely recommend.
Dodge Challenger - Radiator - Fairburn, Georgia
Very professional! A++ work. Will definitely use him again in the future when the time comes!

Misty

8 years of experience
7 reviews
Misty
8 years of experience
Plymouth Voyager - Automatic Shutdown Relay - Tulsa, Oklahoma
She completed the job quickly and my car runs great.

Francisco

8 years of experience
174 reviews
Francisco
8 years of experience
Chrysler Town & Country - Spark Plugs - Portland, Oregon
Francisco arrived in the specified time frame, and not only verified my requested service but made some suggestions to guarantee a good outcome for my misfiring engine. Saved me a ton of time and money!

Justin

13 years of experience
18 reviews
Justin
13 years of experience
Jeep Wrangler - Starter - Reading, Massachusetts
Fast, precise, and very kind. First time user and satisfied with the outcome.

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