The headlights turn off when I turn on my turn signals?

STACYALLIE

MEMBER
2015 KIA CADENZA
3.3L
V6
AUTOMATIC
132,200 MILES

So, my blinker makes my lights turn off and not come back on, it’s not the light sensor because it’s doing this on every setting, (auto, DRL, lamps) so I'm very confused as to why it’s doing this. Whenever I get the switch in just the right position they will stay on, but whenever I turn on my blinker they go off. Think it could be the switch itself but I am not sure.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
43,393 POSTS

So, there is an IPM control module inside the BCM that sounds like it is going out, but to be sure we should do a CAN scan which is easy. You can get a CAN scanner (Controller Area Network) from Amazon for about $36.00.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Amazon CAN scanner link for about $35.00.

https://amzn.to/3R9lJ60

Here is how to change the BCM out for a new unit to help fix the problem. Check out the images (below). Please let us know what you find. We are interested to see what it is.

Images (Click to make bigger)

The headlights turn off when I turn on my turn signals?

1 Reply

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