left turn signal is very fast?

2005 NISSAN FRONTIER
100,000 MILES • 4.0L • V6 • 4WD • AUTOMATIC
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SOUTHERN-BOY
  • MEMBER
  • 2 POSTS
The radio and clock stopped working. I checked fuses and replaced even though good.

The left turn signal blinks very fast while right turn signal is normal.

If it is the BCM I can find no replacement for it as it is discontinued
Mar 31, 2026 at 4:55 PM

What to check next

Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.

Have the lighting concern and radio power concern diagnosed individually before assuming a shared module failure. Document bulb specifications, socket condition and the affected circuits' power and ground checks using the vehicle wiring diagram. A visual fuse check and lamps that still illuminate do not constitute a completed circuit diagnosis. Request test evidence before replacing the radio or sourcing a BCM.

Guidance references and applicability

2CarPros: Original discussion 1712473 https://2carpros.com/questions/radio-clock-stopped-working-and-left-turn-signal-is-very-fast Source for the owner's reported history and outcome. Contributor suggestions are not independently confirmed diagnoses. No attachment content was verified. Fluke: Diagnosing voltage drops https://www.fluke.com/en/learn/blog/automotive/electrical-automotive-troubleshooting General support for testing electrical supplies and connections under load. Use the actual vehicle's circuit diagram and test limits; this reference does not diagnose the reported fault.

Read the replies · Discussion summary and reported outcome

AI-ASSISTED GUIDANCE · REVIEWED BY 2CARPROS
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STRAILER
  • ✓Experienced Mechanic
  • 55,604 POSTS
So, if the fuses are good chances are the radio is bad, which is common to have them just go out. To be clear you checked fuse # 29 under the hood and fuse #4 in the fuse panel inside the truck correct? Please check the blinker bulbs first for the fast blinker issue then start a new thread for it, Sorry, we only handle one problem per thread, please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
Apr 2, 2026 at 4:05 AM
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SOUTHERN-BOY
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Yes I checked both fuses. I did not suspect the blinker bulbs because both work. If one had been out that would have been different but both flash despite doing it very fast. Thank you.
Apr 2, 2026 at 6:13 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,604 POSTS
Okay, I would inspect the bulbs sometimes they can be damaged and still work which causes the resistance to be off which makes then blink fast. Check the bulb sockets as well. If they looks okay I would replace the BCM which controls the blinker flash.
Apr 3, 2026 at 1:15 AM
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Discussion summary

left turn signal is very fast?

The owner reported that the radio and clock stopped working and the left turn signal flashed rapidly while the right side operated normally. The owner said both cited fuses had been checked and both left lamps still flashed. Bulb and socket inspection was suggested, followed by speculation about the BCM.

Reported outcome: No faulty component or successful repair was confirmed.

The fuse numbers and module attribution in the replies were not independently verified. The discussion supplies no loaded voltage measurements, scan results or completed bulb/socket inspection.

Read the original discussion

AI-ASSISTED SUMMARY · REVIEWED BY 2CARPROS
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