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2008 Nissan Titan Trailer Fuse Replacement

This guide will show you how to locate,...

iFixit Library 2008 Nissan Titan Easy 10 minutes Guide 225215

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Guide overview

Before you begin

This guide will show you how to locate, inspect, and replace the trailer-light fuse on a 2008 Nissan Titan. A blown or incorrectly installed fuse can cause the trailer’s brake lights and turn signals to stop working. Replacing the fuse is a quick repair that requires only a few basic tools. Always turn off the vehicle before opening the fuse box or removing a fuse.

Step 1

Repair step

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Open the hood to access the engine compartment.
Make sure the hood is securely propped open to prevent it from closing while you work underneath it.

Step 2

Repair step

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Locate the fuse and relay boxes on the passenger side of the engine compartment, behind the battery.

Step 3

Repair step

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Remove the cover from the fuse and relay box to access the fuses and relays inside.

Step 4

Repair step

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Use the diagram on the underside of the fuse box cover to locate the correct fuse. For this repair, locate the blue 15-amp TOW TURN fuse in the upper-right corner of the fuse box.

Step 5

Repair step

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Using needle-nose pliers, carefully remove the 15-amp fuse. Check whether the fuse is blown or installed in the incorrect location.
Carefully remove the chip to avoid damaging it in case it is still usable.

Step 6

Repair step

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Inspect the horseshoe-shaped metal strip inside the fuse. If the strip is broken or separated in the middle, the fuse is blown and must be replaced.
Carefully inspect the chip to avoid damaging it in case it is still usable.

Step 7

Repair step

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Another way to check the fuse is by using a trailer light tester. The tester will illuminate when the running lights, turn signals, reverse lights, or brakes are activated. If the correct light does not illuminate, the fuse may be blown.

Step 8

Repair step

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Activate the vehicle’s left turn signal and check the LT indicator on the trailer light tester. If the indicator does not illuminate, the left turn signal connection is not receiving power.

Step 9

Repair step

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Activate the vehicle’s right turn signal and check the RT indicator on the trailer light tester. If the indicator does not illuminate, the right turn signal connection is not receiving power.

Step 10

Repair step

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If the fuse is blown, replace it with a new 15-amp fuse. If it was installed in the wrong location, place it in the correct slot by following the diagram on the underside of the fuse box cover.
Remember to put the cover back on the fuse and relay box.

Step 11

Repair step

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Activate and retest both turn signals. With the 15-amp fuse in the correct location, the LT and RT indicators on the trailer light tester should illuminate, confirming both signals are receiving power. Use the earlier blinker photos with the tester photos to show each signal working. The repair is complete.