1999 blazer 4door 4.3l v-6, 4x4.
Problem - Out of the blue left turn signal started fashing fast like a bulb was burnt, not the case as far as I can see, bought a new flasher, also not the problem. Checked all fuse's. Non burnt.

Any suggestion on this problem.

Thanks

 

my guess is that you have a bulb that is bad.some of them are dual filament. that would be my conclusion

 

Yep check your bulbs

 

So it is possible that the bulb will still work but one filiment be burnt.

I will give it a try as I am working on it right now in the garage on the 4x4 vacume lines. Trying to get the
4x4 to work again. One thing after another on these rig's, good thing for this forum..

Later

 

yea, theya re dual filaments,. will look like it works fine, but the back ones are duals.

 

Your right, checked the back middle bulb, bottom filiment was burn off and shorted on the arm. Still
working but shorted just the same. Oh well, I have a new flasher now also.
Thanks