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Anonymous Posted on Jun 14, 2017

2004 Toyota Sienna horn blows and lights flash for no reason, then stop for a few minutes and repeat again.

Finally, disconnected the battery so all of us, including the neighbors, could sleep. Earlier in the evening had another electrical problem. The cooling fan wouldn't turn off after turning the car off even though the temperature is in the low 30s, so I (Rob) removed the relay, which fixed that problem. Now, I'm wondering if there is a connection. Could removing the fan relay have precipitated the problem with the horn blowing and the lights flashing?

5 Related Answers

Anonymous

  • 1861 Answers
  • Posted on Feb 18, 2009

SOURCE: Cooling Fan wont turn off and kills battery

Glad to hear that you are all fixed up!

The sunroof leak is caused by a blockage in the drain tubes. Please make sure that your dealer cleans the sunroof drains.

A FixYa rating (4 blue diamonds) would be greatly appreciated for my assistance. Thanks!

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Anonymous

  • 3 Answers
  • Posted on May 12, 2009

SOURCE: A/c problem.

jasonjacob1 is right. If the air from the A/C is not cool, the only cause is low or empty refrigerant. This means that the gas that your vehicle uses to produce cool air is gone from the system. The solution is not to recharge the system but to locate and fix the leak, then recharge the system.

mkv0525

Mike Vincent

  • 358 Answers
  • Posted on Jun 16, 2009

SOURCE: 2004 toyota sienna a/c not working one side cold other side warm

there are two a/c lines that run down the fire wall under the van to the rear.right around the bottom of the fire wall the is a connection point on both lines. you will find a leak there .replace the orings and recharge system. also you will need two specail toyota tools to release the couplings.i have done this repair on several sienna's. let me know if this helps.

Kiri Amarakoon

  • 290 Answers
  • Posted on Jan 11, 2010

SOURCE: 2004 toyota celica will not blow hot air for twenty minutes

If the engine temprature does not reach the normal level as it used to, it may be the coolant thermostat.

Iif it does, it could be air diverter gates not working properly, cold air blowing at a a light could point to that. The diverter gates are located under the dash.

It also coul be the valuve that controls the water to the heater core, but unlikely cause of the cold air at a light.

Anonymous

  • 1 Answer
  • Posted on Jan 26, 2010

SOURCE: toyota sienna - a/c light blinking

Hello, I am a tec. from Puerto Rico your problem does sound like the magnetic clutch. It is located directly on the compresor, over here we change them for around $150 including materials and work.

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Horn

my horn did the same thing - we disconnected the horn (which in an 02' is behind the passenger side headlight) I'm sure it's wearing out and we need to replace it.
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