My truck is a 2004 Chevy RC/SB Ever since I've had it the left blinker only works when it wants to. When the weather changes, it quits. When it rains, It quits. Gets cold or warm, it quits. Its only the front blinker and its the left front. I have checked all the wiring bulbs housing its even been in under warranty 3 times and they couldn't fix it. Has anyone ever had this problem. I need advice.

 

turn signal switch.

 

check you grounds also, make sure they are clean and have good contact.
there should be one groung behind each headlight under the hood

 

I had a similar problem...the blinker would work...and if you hit the bed just right it wouldn't, then hit it again it would quit...i just did the easy trial and error...swapt the bulb with the other size...worked...changed the bulb...it turned out that wire came out of the bulb...so it was only making a partial connection in the plug...

so i guess long story short...check the bulb...and socket for faults or corrosion...and grounds...

Dustin

 

need to change yer blinker fluid, its running low... lol grounds, blubs, lose wires in the socket

 

Mythbusters needs to do a show on seeing if a vehicle could have a liquid blinker set up...i say plausible...water does allow electricity to flow through it...so i could make a connection...haha...

Dustin

 

hate to tell yall this but I have already checked to blinker fluid and both the right side and left side resevoirs are topped off. All grounds wires bulbs and housings look good the only one is the ground behind the headlight. All other stuff has been checked. The switch has been replaced 3 times under warranty. They tried to replace the whole wiring harnass in the truck but that was after the turbo stuff and I said no. Thanks for the advice