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Joe Black Posted on Jun 13, 2017
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1998 Toyota 4runner: Short somewhere in the brake switch/brake light/shift lock system.

When I got in to my car today, I was unable to shift out of park and my brake lights would not turn on. I eventually found the problem was a blown fuse, but when I replaced it and tried the brakes, it immediately blew the new fuse. I figure that I have a short somewhere in the system. What are the places where I am most likely to find the short, or what is the best way to find that short? Also, is there a wiring schematic for the system anywhere on the internet?

1 Answer

boneman1975

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  • Expert 187 Answers
  • Posted on Jun 13, 2017
boneman1975
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Try this. same for 98-02

http://web.archive.org/web/20100531053202/http://www.ncttora.com:80/fsm/1996/SIL/fsm/wiring.html

5 Related Answers

Anonymous

  • 1861 Answers
  • Posted on Oct 15, 2008

SOURCE: dead stereo...

I will bet that you have a short circuit at the cigar lighter/power socket. I have observed this many times. Cell charger adaptors are not the "exact fit" for the Toyota lighter sockets. The power prong sometimes gets bent, from the adaptor, and shorts out to the outer case of the socket. Unplug the lighter plug & try another fuse.
I am reasonably confident that tis is your issue. Hope this helps you out.

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Anonymous

  • 1861 Answers
  • Posted on Nov 04, 2008

SOURCE: no brake lights, fuses keep blowing and wont shift out of park

I would look for a wiring short in the trunk at the taillamp area, or, inspect the sockets for the taillamp bulbs for corrosion. In any case, you have a short circuit in the trunk area, also check the wire that comes from the body & goes up the trunk hinge on the driver side; that wire may be chafed, and it may be shorting out. Hope this helps; please get back to me if you need any further assistance.

Anonymous

  • 341 Answers
  • Posted on Nov 26, 2008

SOURCE: 1999 Toyotal Camry brake lights are out.

You have a ground issue.Current from another circuit is running through the lights to get to ground. this causes them to burn out quickly.You need to do a real detailed visual check.A good component wiring diagram and component locator is a requirement here.

Anonymous

  • 1 Answer
  • Posted on Apr 12, 2009

SOURCE: 1997 TOYOTA 4RUNNER SR5 WON'T SHIFT OUT OF PARK

I had the exact same problem. It is the fuse for the brake lights ( a red 10 amp fuse) that is blown. It was the wiring in the trailer that caused it to blow. Replace that fuse and it will work perfectly!!

Anonymous

  • 1 Answer
  • Posted on Jun 22, 2010

SOURCE: no brake lights

Hi my Name is Marcus . I have a 99 toyota corolla and i have problems with the brake lights . I have change the bulbs . I have check my fuses , i have also change the brake pad switch . I was told that i to change the brake switch with a part for Toyota Dealership . Plz help me

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Why do fuse's keep blowing ? A short circuit to (ground) somewhere . Do you know how to use a wiring diagram an a DVOM - digital volt ohm meter to test electrical circuit's ? Brake ? brake light's ? You can't get it out of park because of the shift lock solenoid ( shifter interlock system ) This is a safety system that won't let gear selector to move from park unless driver is pushing the brake pedal . The fuse blowing - no power to brake light switch , computer see's no signal so it won't energize the shift lock solenoid .
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You have a shift interlock problem . What kind of vehicle ? a mercury what ?
Shift Interlock System
The shift interlock system prevents shifting from PARK unless the brake pedal is depressed. The shift interlock system consists of a shift lock actuator mounted on the selector lever. If the ignition switch is in the RUN position, the shift lock actuator is disabled when the brake pedal is depressed.
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Do the brake lights work ?
Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:

Visual Inspection Chart Mechanical Electrical
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    • F22 (15A)
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PINPOINT TEST A: SHIFT INTERLOCK SYSTEM DOES NOT RELEASE/LOCK CORRECTLY Test Step Result / Action to Take A1 TEST THE BRAKE LIGHTS
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  • Key in OFF position.
  • Check fuse: Smart Junction Box (SJB) Fuse F22 (15A).
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Yes
GO to A4 .

No
GO to A3 . A3 TEST THE CIRCUIT FOR A SHORT TO GROUND
  • Key in OFF position.
  • Disconnect: Brake Pedal Position (BPP) Switch.
  • Measure the resistance between pin 1 and ground.
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  • Is the resistance greater than 10,000 ohms?
Yes
GO to A4 .

No
REPAIR circuit for short to ground. TEST the system for normal operation
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I had the exact same problem. It is the fuse for the brake lights ( a red 10 amp fuse) that is blown. It was the wiring in the trailer that caused it to blow. Replace that fuse and it will work perfectly!!
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1997 TOYOTA 4RUNNER SR5 WON'T SHIFT OUT OF PARK

You have a blown fuse for the brake lights. The shifter will not come out of park if the brake lights do not work. The crusie will not work, either. I will bet that there is a short in your trailer wiring, and it popped the brake light fuse. Easy to check; get in, start it up, push the brake. If there are no brake lights, the fuse is your problem. Please respond if this helps. Thnaks for choosing FixYa.
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