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Blowing blinker fuse

Tiny
PIGLETRMA
  • MEMBER
  • 1991 TOYOTA PREVIA
  • 2WD
  • AUTOMATIC
  • 440,000 MILES
First, I had my left side blinker blinking faster than the right (and all blinkers were lighting up) then it started blowing fuses as soon as I turn either blinker on. I disconnected the trailer harness to eliminate that possibility. Same problem.
Friday, March 20th, 2020 AT 8:13 AM

16 Replies

Tiny
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  • 52,797 POSTS
Good morning,

Were any bulbs changed recently? If the wrong bulb was installed, it will do this.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-wiring

Do all the other bulbs work as commanded?

Do you have a test light or volt meter to do some checks?

Roy
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Friday, March 20th, 2020 AT 8:18 AM
Tiny
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I do have a voltmeter. No bulbs recently changed.
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Friday, March 20th, 2020 AT 8:36 AM
Tiny
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Do all other bulbs work normally?

Roy
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Friday, March 20th, 2020 AT 8:43 AM
Tiny
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Yes, brakes and taillights seem to be fine.
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Friday, March 20th, 2020 AT 8:46 AM
Tiny
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I attached a picture for you. The connector I circled, please disconnect it and see if the fuse still fails.

The connector is at the bottom of the steering column.

Roy
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Friday, March 20th, 2020 AT 8:53 AM
Tiny
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Okay, this is weird, but may help. I removed all bulbs. I ran out of 7.5 amp fuses so put a 20 in (I know, not for long) with all bulbs out, when I turn on either right or left I get a squealing noise from the dash.
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Friday, March 20th, 2020 AT 8:58 AM
Tiny
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Okay, I will disconnect that. Thanks!
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Friday, March 20th, 2020 AT 9:00 AM
Tiny
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Okay, remove it. By doing that, you are overheating the circuit and can cause wiring harness melt down.

You never, ever install a larger fuse than required as you can cause more issues.

Roy
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Friday, March 20th, 2020 AT 9:01 AM
Tiny
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Keep me updated.

Roy
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Friday, March 20th, 2020 AT 9:04 AM
Tiny
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Dang. That is going top take some dash surgery to even see that. I will get back when I succeed. Thanks
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Friday, March 20th, 2020 AT 9:05 AM
Tiny
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Sounds good.

Roy
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Friday, March 20th, 2020 AT 9:13 AM
Tiny
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Well, I only had it in for a second. Just long enough to hear that noise. What do you think that buzzing was coming from? I have heard it buzz in the past from time to time, but it always went away.
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Friday, March 20th, 2020 AT 9:55 AM
Tiny
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Sounds like it could be a short in the harness.

Roy
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Friday, March 20th, 2020 AT 9:56 AM
Tiny
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Another suggestion. I would go to a part store and get a self resetting circuit breaker of the correct amperage so you do not have keep replacing fuse to determine the issue.

Roy
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Friday, March 20th, 2020 AT 1:04 PM
Tiny
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Turns out it was the flasher!
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Friday, March 20th, 2020 AT 5:01 PM
Tiny
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Good find. We were not there yet but would have got there.

Good find. Glad it is fixed.

Roy
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Friday, March 20th, 2020 AT 5:08 PM

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