Hi,

I've scoured the forum and can't find anything applicable...

- 2005 Blazer ZR2
- Drivers side front and rear bulbs blink fast with turn signal but normal with hazards
- Have replaced both front drivers side turn signal bulbs and drivers side rear turn signal bulb
- Have replaced flasher in behind glove box

Is there another flasher elsewhere? Or something else that I should check?

 

Check all bulbs on the drivers side including small clearance lights.

Check all driver side light grounds and sockets for broken or loose wires, corrosion Ect.

With hazards on the riders side ties together with driver side and will compensate for the fault

 

I had a similar situation with the right turn signal, replaced the bulb in the rear and all was well for a while then it occurred again. I had a cracked lens that allowed rain water to get to the bulb socket and short the circuit. replaced lens and no more problems.

 

Most vehicles have a separate circuit for the hazard flasher by design.

It is kind of a redundant design. The hazard flasher has it's own power supply, mostly directly on a always hot battery wiring and it's own flasher relay.

While the turn signals are hooked up in such a way that when a bulb fails it cuts on the time needed to do a cycle. Could be anything from the bulb, to 2004 Blazers's corrosion problem to a ground problem.