01 Yukon XL SLT: What can be causing my front left turn signal to only work sometimes?

[yukonxlfan]

Okay so here is the deal... the front left turn signal on my 01 Yukon XL SLT 5.3L used to hyperblink (only the rear turn signal of course... Since the front didnt work.) When I found out that it wasnt working... I went about changing the bulb to no avail as it still kept on not working. I did some research and the only thing that people kept saying on Youtube and forums was that it is most likely the Hazard and Turn Signal Flasher. So I changed it with a Novita Turn Signal Flasher. Now it doesnt hyperblink anymore... And the front drivers side turn signal finally works BUT only works sometimes... Like let's say 1 hour yes 1 hour no. What do you guys think could be causing it to only work sometimes? Maybe the Novita Flasher isn't a good product? Etc. thanks... any insight on what might be wrong would be greatly appreciated.

 

[SnowDrifter]

Turn signals run through the hazard switch, which if it goes bad, can cause issues like you're describing.

I generally hate recommending the parts cannon, but the tradeoff of time it takes to investigate electrical issues vs. the cost of tossing a new hazard switch in isn't there. Replace it and see if the issue persists

 

[KookyKoala]

Have you checked connections in socket are they clean and not burnt? Also check the marker light is not out. I has similar issue with mine working sometimes till I changed the socket.

I have had no issues with my Novita flasher after light issues were fixed. They seem to be finicky if your lights arnt working with the stock flasher unit.

 

[Doubeleive]

ya the first easiest thing to check is to pull the bulb out, clean the socket contacts with a flat head screwdriver or anything that will clean the metal contacts good and put the bulb back in and see if that resolves the problem, in the process you could also bend the little metal tabs in a little so the bulb is nice and tight.

that has resolved problem for me before especially on the daytime running lights over time the sockets change shape from the heat.

 

[Bombsquad85]

Isn't there a junction box in front of the passenger side rear wheel? Under the truck?

 

[yukonxlfan]

Yeah thank u and everybody else for the help... so it ended up (hopefully) just being the corrosion and stuff in the socket. I cleaned it with electrical cleaner and a small screwdriver. The socket had green and light brown corrosion and the bulb itself had some black corrosion on the metal contact parts. When I put the key in and put the turn signal to the left it worked right away... and my dad and I went for a 1 hour drive and we pulled over like 5 times to check if the turn signal worked and it did each time we checked! So far so good... I'll check back in in a month to confirm whether it keeps working or not

 

[KookyKoala]

good glad that fixed it you can use a little bulb grease as well to help protect from more corrosion from forming

 

[SnowDrifter]

good glad that fixed it you can use a little bulb grease as well to help protect from more corrosion from forming

I use dielectric grease like frank's red hot


Though, my concern now is where the corrosion game from. That's not normal behavior

 

[yukonxlfan]

Update: the problem seems to be overall fixed! I've been checking daily for the passed week and everytime I check the light works now! The corrosion seemed to be the problem