Skip the auto shop - Our mechanics make house calls

Q: Blinker/turn signal does not work or blink, stays on can hear a click though - 2004 Chevrolet Express 2500

asked by on

we pulled a black moduler box with number 25746427, you can hear a click but no blinking do you think the black box needs to be replaced

My car has 285000 miles.
My car has an automatic transmission.

Hi there - your symptoms suggest an electrical problem with the bulbs, or wiring to the them - not the flasher unit itself. Check for good bulbs, good contacts in the bulb receptacles, and good grounds at each corner of the vehicle. If the hazard warning lights work (some of them anyway), that will confirm that the flasher unit (shared between turn signals and hazard warning lights) is functioning properly. I recommend an electrical component inspection by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Blinker/turn signal does not work or blink, stays on can hear a click though - 2004 Chevrolet Express 2500

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Turn light indicators and speedometer malfunctioning

This is a common problem on the Chevy S10 Blazers of this era. There is a small power supply board behind the dash which regulates the transfer of power to these components. These are known for going bad. This can...

Q: Oil pressure loss - 2005 Chevrolet Avalanche

Hello - no, most likely this is the oil pressure relief valve sticking in the "open" position when the pressure comes up. It may then release after sitting a bit, or when you next hit the starter. The early 4.8/5.3...

Q: How to disable passenger airbag in work van?

It's always advisable to transport small children in the back seat. However, if your van does not have back seats, there should be an airbag off switch located on the passenger side of the dash. The vehicle key must be...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...