Taillights do not work, left front blinker stays lit?

2012 CHEVROLET SILVERADO

225,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC

TONY SHRPFR

MEMBER
1 POST

With the key off, both drivers side blinkers stay on. Draining the battery overnight. With key on, taillights do not work, all blinkers and hazards work as they should when switches for them are turned on. Fuses okay. Ideas?

Dec 27, 2022 at 11:31 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,240 POSTS

Hi,

This could be related to the body control module. That is the module that is responsible for controlling the lights.

We have a short to power at some point. It could be integral to the BCM or there could be a short at a different point. To eliminate the BCM, remove fuse 6 in the interior fuse box. Do the lights turn off with that fuse removed, and the key off?

Let me know. I attached the schematic showing that the fuse powers the left signal at the BCM. Pic 2 shows the fuse location.

Let me know when you turn the key on if the left signal lamps turn off.

Try this and let me know what you find.

Take care,

joe

See pics below.

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Dec 27, 2022 at 1:48 PM

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