Toyota Celica, Corolla, ECHO & MR2 1999-05

Fuses, Fusible Links & Circuit Breakers Repair Guide

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In case of an overload in the circuits from the battery, the fusible links are designed to melt before damage to the engine wiring harness occurs. Headlight and other electrical component failure usually requires checking the fusible links for melting. Fusible links are located in the engine compartment next to the battery.

The fusible link is replaced in a similar manner as the regular fuse, but a removal tool is not required.


CAUTION
NEVER install a wire in place of a fusible link. Extensive damage and fire may occur.

In the event the rear window defogger, environmental control system, power windows, power door locks, power tail gate lock, sunroof or automatic shoulder belt does not work, check its circuit breaker. Circuit breakers are located in the passenger's or driver's side kick panel with the fuses.

Circuit Breakers



Resetting & Replacement
  1. Turn the ignition switch to the OFF position.
  2.  
  3. Disconnect the negative battery cable. Wait at least 90 seconds before working on models with SRS system.
  4.  
  5. Remove the circuit breaker by unlocking its stopper and pulling it from its socket.
  6.  

To install:

  1. Carefully snap the breaker into place and be sure to secure.
  2.  

Always use a new circuit breaker with the same amperage as the old one. If the circuit breaker immediately trips or the component does not operate, the electrical system must be checked.

  1. Connect the negative battery cable.
  2.  

  1. Insert a thin object into the reset hole and push until a click is heard.
  2.  
  3. Using an ohmmeter, check that there is continuity between both terminals of the circuit breaker. If continuity is not as specified, replace the circuit breaker.
  4.  



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Fig. Resetting a circuit breaker

Fuses



Replacement

There are several fuse blocks. They are located in the engine compartment and under the dash instrument panel.



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Fig. Lift the fuse block lid while pulling back on the clamp



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Fig. On the fuse box lid is a label of all recommended amperage fuses and relay locations



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Fig. Lift up and pull the fuse lid on the interior to remove



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Fig. Common fuse cover listing on interior fuses

If any light or electrical component in the vehicle does not work, its fuse may be blown. To determine the fuse that is the source of the problem, look on the lid of the fuse box as it will give the name and the circuit serviced by each fuse. To inspect a suspected blown fuse, pull the fuse straight out with the pull-out tool and look at the fuse carefully. If the thin wire that bridges the fuse terminals is broken, the fuse is bad and must be replaced. On a good fuse, the wire will be intact.



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Fig. A fuse puller will make the removal much easier

Sometimes it is difficult to make an accurate determination. If this is the case, try replacing the fuse with one that you know is good. If the fuse blows repeatedly, then this suggests that a short circuit lies somewhere in the electrical system and you should have the system checked.


CAUTION
When making emergency replacements, only use fuses that have an equal or lower amperage rating than the one that is blown, to avoid damage and fire.



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Fig. The larger type fuse are a medium and high amperage rating ...



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Fig. ... and can be removed with your fingers by simply pulling upward

When installing a new fuse, use one with the same amperage rating as the one being replaced. To install the a new fuse, first turn off all the electrical components and the ignition switch. Always use the fuse pull-out tool and install the fuse straight. Twisting of the fuse could cause the terminals to separate too much which may result in a bad connection. It may be a good idea to purchase some extra fuses and put them in the box in case of an emergency.



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Fig. When replacing a fuse, ONLY use the same amperage as the one removed

 
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