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<p>Welcome to your comprehensive guide to the fuse box diagrams and amperage ratings for the 2017 Toyota Corolla. Understanding your vehicle's fuse boxes is crucial for troubleshooting electrical issues and performing basic maintenance. This guide will walk you through the locations of all fuse boxes, detail the fuses within each, and explain what each fuse protects. Remember to always consult your vehicle's owner's manual or the fuse box lid for the most accurate and up-to-date information, as fuse configurations can vary slightly between trim levels.</p>
<h2>Quick answer</h2>
<p>Your 2017 Toyota Corolla has two primary fuse box locations:</p>
<ul>
<li><strong>Under-hood:</strong> Located in the engine compartment.</li>
<li><strong>Dash Kick-Panel (Interior):</strong> Located on the driver's side, behind a small access panel.</li>
</ul>
<h2>Under-Hood Fuse Box</h2>
<p>The under-hood fuse box contains fuses for critical engine components, headlights, and other high-current circuits. It also houses several relays.</p>
<h3>Relays in the Under-Hood Fuse Box:</h3>
<ul>
<li><strong>MAIN:</strong> Main EFI Relay</li>
<li><strong>EFI-NO.2:</strong> Fuel Pump Relay</li>
<li><strong>HEAD (LO LH):</strong> Left Headlight Low Beam Relay</li>
<li><strong>HEAD (LO RH):</strong> Right Headlight Low Beam Relay</li>
<li><strong>HEAD (HI LH):</strong> Left Headlight High Beam Relay</li>
<li><strong>HEAD (HI RH):</strong> Right Headlight High Beam Relay</li>
<li><strong>HORN:</strong> Horn Relay</li>
<li><strong>FAN (MAIN):</strong> Cooling Fan Relay</li>
<li><strong>A/C MG CLUTCH:</strong> A/C Magnetic Clutch Relay</li>
<li><strong>STARTER:</strong> Starter Relay</li>
</ul>
<table>
<thead>
<tr>
<th>Fuse #</th>
<th>Amp</th>
<th>Color</th>
<th>Circuit / Component Protected</th>
</tr>
</thead>
<tbody>
<tr>
<td>AM2</td>
<td>30A</td>
<td>Green</td>
<td>Ignition Switch, Starter Relay</td>
</tr>
<tr>
<td>MAIN</td>
<td>40A</td>
<td>Pink</td>
<td>Main Power for various systems (ECM, Injectors, Ignition Coils)</td>
</tr>
<tr>
<td>EFI-NO.2</td>
<td>10A</td>
<td>Red</td>
<td>Fuel Pump</td>
</tr>
<tr>
<td>EFI-NO.1</td>
<td>10A</td>
<td>Red</td>
<td>ECM/PCM</td>
</tr>
<tr>
<td>ETCS</td>
<td>10A</td>
<td>Red</td>
<td>Electronic Throttle Control System</td>
</tr>
<tr>
<td>H-LP LH LO</td>
<td>10A</td>
<td>Red</td>
<td>Left Headlight Low Beam</td>
</tr>
<tr>
<td>H-LP RH LO</td>
<td>10A</td>
<td>Red</td>
<td>Right Headlight Low Beam</td>
</tr>
<tr>
<td>H-LP LH HI</td>
<td>10A</td>
<td>Red</td>
<td>Left Headlight High Beam</td>
</tr>
<tr>
<td>H-LP RH HI</td>
<td>10A</td>
<td>Red</td>
<td>Right Headlight High Beam</td>
</tr>
<tr>
<td>TAIL</td>
<td>10A</td>
<td>Red</td>
<td>Tail Lights, Parking Lights, License Plate Lights</td>
</tr>
<tr>
<td>ABS NO.1</td>
<td>50A</td>
<td>Red</td>
<td>ABS Pump Motor</td>
</tr>
<tr>
<td>ABS NO.2</td>
<td>30A</td>
<td>Green</td>
<td>ABS/VSC Solenoid Valves</td>
</tr>
<tr>
<td>FAN NO.1</td>
<td>30A</td>
<td>Green</td>
<td>Cooling Fan</td>
</tr>
<tr>
<td>A/C MGC</td>
<td>10A</td>
<td>Red</td>
<td>A/C Magnetic Clutch</td>
</tr>
<tr>
<td>HORN</td>
<td>10A</td>
<td>Red</td>
<td>Horn</td>
</tr>
<tr>
<td>ALT</td>
<td>100A</td>
<td>Blue</td>
<td>Alternator Main Fuse</td>
</tr>
<tr>
<td>IGT MAIN</td>
<td>50A</td>
<td>Red</td>
<td>Ignition Main Power</td>
</tr>
<tr>
<td>ECU-B</td>
<td>10A</td>
<td>Red</td>
<td>ECU-B (Battery) power for various modules</td>
</tr>
<tr>
<td>DRL-NO.2</td>
<td>7.5A</td>
<td>Brown</td>
<td>Daytime Running Lights</td>
</tr>
</tbody>
</table>
<h2>Dash Kick-Panel Fuse Box (Interior)</h2>
<p>This fuse box is located on the driver's side, typically behind a small removable panel near the left kick panel or knee bolster. It protects various interior electrical components.</p>
<table>
<thead>
<tr>
<th>Fuse #</th>
<th>Amp</th>
<th>Color</th>
<th>Circuit / Component Protected</th>
</tr>
</thead>
<tbody>
<tr>
<td>DOME</td>
<td>10A</td>
<td>Red</td>
<td>Interior Lights, Clock, Audio System Memory</td>
</tr>
<tr>
<td>ACC</td>
<td>10A</td>
<td>Red</td>
<td>Accessory Power (Radio, Power Outlets when ignition is OFF)</td>
</tr>
<tr>
<td>CIG</td>
<td>15A</td>
<td>Blue</td>
<td>Cigar Lighter / 12V Power Outlet</td>
</tr>
<tr>
<td>RADIO</td>
<td>15A</td>
<td>Blue</td>
<td>Audio System / Infotainment</td>
</tr>
<tr>
<td>PWR OUTLET</td>
<td>15A</td>
<td>Blue</td>
<td>Additional 12V Power Outlet (if equipped)</td>
</tr>
<tr>
<td>WIPER</td>
<td>20A</td>
<td>Yellow</td>
<td>Windshield Wipers</td>
</tr>
<tr>
<td>WASHER</td>
<td>15A</td>
<td>Blue</td>
<td>Windshield Washer Pump</td>
</tr>
<tr>
<td>STOP</td>
<td>10A</td>
<td>Red</td>
<td>Brake Lights, Shift Interlock</td>
</tr>
<tr>
<td>GAUGE</td>
<td>10A</td>
<td>Red</td>
<td>Instrument Cluster, Gauges</td>
</tr>
<tr>
<td>ECU-IG NO.1</td>
<td>10A</td>
<td>Red</td>
<td>Various Control Units (e.g., HVAC, Power Windows)</td>
</tr>
<tr>
<td>HEATER</td>
<td>40A</td>
<td>Pink</td>
<td>Blower Motor Relay / Blower Motor</td>
</tr>
<tr>
<td>FR FOG</td>
<td>15A</td>
<td>Blue</td>
<td>Front Fog Lights (if equipped)</td>
</tr>
<tr>
<td>TURN&HAZ</td>
<td>10A</td>
<td>Red</td>
<td>Turn Signals, Hazard Lights</td>
</tr>
<tr>
<td>DOOR NO.2</td>
<td>20A</td>
<td>Yellow</td>
<td>Power Door Locks</td>
</tr>
<tr>
<td>PNL</td>
<td>7.5A</td>
<td>Brown</td>
<td>Panel Lights (Dash Illumination)</td>
</tr>
<tr>
<td>SRS</td>
<td>10A</td>
<td>Red</td>
<td>Supplemental Restraint System (Airbags)</td>
</tr>
<tr>
<td>MIR HTR</td>
<td>10A</td>
<td>Red</td>
<td>Heated Mirrors (if equipped)</td>
</tr>
<tr>
<td>POWER WINDOW</td>
<td>30A</td>
<td>Green</td>
<td>Power Windows</td>
</tr>
<tr>
<td>SEAT HTR</td>
<td>15A</td>
<td>Blue</td>
<td>Heated Seats (if equipped)</td>
</tr>
</tbody>
</table>
<h2>How to Test a Fuse</h2>
<p>Testing a fuse is a straightforward process that can help you diagnose electrical problems. Here's how you can do it:</p>
<ol>
<li><strong>Safety First:</strong> Ensure the vehicle's ignition is off and disconnect the negative terminal of the battery if you're working with major components.</li>
<li><strong>Locate the Fuse:</strong> Open the appropriate fuse box (under-hood or interior) and identify the suspicious fuse using the diagrams above and the label on the fuse box cover.</li>
<li><strong>Remove the Fuse:</strong> Use the plastic fuse puller tool (usually found in the under-hood fuse box or with the spare fuses) to carefully remove the fuse.</li>
<li><strong>Visual Inspection:</strong> Hold the fuse up to the light. If the metal wire or strip inside is broken or burnt, the fuse is blown and needs replacement.</li>
<li><strong>Test with a Multimeter (Recommended):</strong>
<ul>
<li>Set your multimeter to the continuity setting (often indicated by a speaker or diode symbol).</li>
<li>Touch one probe of the multimeter to each metal blade of the fuse.</li>
<li>If the multimeter beeps or shows a reading of zero or near-zero ohms, the fuse is good. If it shows "OL" (open loop) or no reading, the fuse is blown.</li>
</ul>
</li>
<li><strong>Replace the Fuse:</strong> If the fuse is blown, replace it with a new fuse of the exact same amperage rating and color. Using a fuse with a higher amperage can cause serious damage to your vehicle's electrical system or even lead to a fire.</li>
</ol>
<h2>Common Blown Fuses on This Vehicle</h2>
<p>While any fuse can blow, some are more commonly affected due to their circuits or frequent use. If you experience an electrical issue, here are some common fuses to check first on a 2017 Toyota Corolla:</p>
<ul>
<li><strong>CIG / PWR OUTLET (15A):</strong> Often blows due to overcharging devices or faulty accessories plugged into the 12V outlets. If your phone charger or dash cam isn't working, check this first.</li>
<li><strong>RADIO (15A):</strong> Problems with the audio system or infotainment can sometimes be traced back to this fuse.</li>
<li><strong>HEATER (40A) / BLOWER:</strong> If your fan isn't working for the heating or air conditioning, this high-amperage fuse is a common culprit. A failing blower motor can draw too much current and blow the fuse.</li>
<li><strong>STOP (10A):</strong> If your brake lights aren't working, or you can't shift out of Park, this fuse is the first place to look.</li>
<li><strong>WIPER (20A) / WASHER (15A):</strong> If your windshield wipers or washer fluid pump stops working, these fuses are likely the cause.</li>
</ul>
<p>When a fuse blows, it's usually an indication of an underlying problem. While replacing the fuse might temporarily fix the issue, if it blows again, it's crucial to investigate the circuit for shorts, faulty components, or excessive current draw.</p>
<h2>Find a trusted shop on Repairius.</h2>
Before you pull a fuse on the 2017 Toyota Corolla
Use the label printed on the panel cover or the owner's manual for your exact build. Layouts change with options, model year and build date, so a chart for another truck can be wrong.
Replace a blown fuse only with the same amp rating. A larger fuse can let wiring overheat.
A fuse that blows again right away means a short or failing component downstream. Find the cause before replacing it again.
A good fuse doesn't prove the circuit works — relays, grounds and connectors fail too.
Disconnect the battery before working near high-current fuses or cables.
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