HELP Mysterious indicator problem
 

Hi
I have a Hyundai Santa Fe 2008 2.2 diesel

I have a problem which I cannot fix with my indicator. On one side only the indicator is flashing at double speed (like a bulb has blown). The problem started after blowing a maxi fuse? I have taken it to the garage but they cannot figure it out!!
I have tried the following:

• Changed all bulbs
• Checked all other bulbs
• Changed front indicator bulb holder from on side to the other
• Plugged in the other side rear light
• replaced the ICM relay
• adding an extra bulb!! (Knew this wouldn't work but thought maybe increasing the resistance may work)

None of these made any difference. I am not great with electronics so if anyone has any suggestions what it could be or that I could test i would be grateful.

Thanks

My first question would be , do all the lights work ?
If not which ones don't work?
Right now have no idea what we are looking for or where to look.
Need all specific info as to just what is not working and where, OK ?

Yeah all lights are working fine. All other electronics (seat warmer, heaters etc) are also working. Not sure if it helps but when I put the hazards on the indicators all flash correctly

UDPDATE: after fiddling around today I have found a solution (sort of) I thought I would post it here just in case anyone else had this issue.

The problem is caused by the trailer hitch, there is some sort of problem with it, I have now disconnected this wiring loop and everything now works fine.

Thanks for the info and update.
Next time if I remember, when a light problem comes up , to ask if there is a trailer hitch system on the vehicle.

Is that what this is? I am having the same problem and found this uninstalled...
[img alt="Is that what this is? I'm having the same problem and found this uninstalled...
"]https://cimg3.ibsrv.net/gimg/www.hyundaiforum.com-vbulletin/720x1612/screenshot_20250822_172957_12772f0a5858d86353df459 b38436996e638a5cc.png[/img]
Is that what this is? I'm having the same problem and found this uninstalled...

I recently received a recall letter from Hyundai Canada to have my vehicle checked by a Hyundai dealer due to electrical issues if my Hyundai Santa Fe had a trailer hitch attached....Check this recall with your Hyundai dealer.

I have a similar problem right now on a 2019 Hyundai Santa Fe with 17" wheel rims. After 150,000 km (93,000 miles), I changed the front and rear brake pads. The front brake piston calipers compressed with no problems allowing the installation of new brake pads but both rear brake piston calipers would not compress. I had to slightly turn the caliper piston on both rear calipers to allow the pistons to compress and allow the installation of new brake pads. Afterwards, the brake pedal returned to a firm, hard position and no brake lights appeared and the brakes seemed to be working normally. I noticed after 2 months that the front caliper and pads seem to be operating OK and the rotors had a clean shiny surface due to brake pad contact but both rear rotors are developing an ongoing rust buildup and I suspect that both rear caliper pistons are not compressing the rear brake pads hence the steady buildup of corrosion/rust on the rear rotors. My plan is to remove the rear brake pads and reinstall. Any reason for the rear caliper pistons not compressing and do you think I damaged the rear caliper pistons by turning them?....Any suggestions would be helpful.