Driver side low beam getting too much voltage. Help!

[Mpereira93]

Never had a problem like this before. I have led bulbs installed and noticed yesterday my driver side one was dim. After measuring the connector with a multimeter I noticed there were 14v going to the low beam which I know isn't normal. Checked all my fuses (that I could find) and they're all good, anyone have any ideas? Thanks in advance 

[Brianibew]

Try putting your regular bulbs back in and retest.  It may be the LEDs causing the issue.

[papageoff]

Never had a problem like this before. I have led bulbs installed and noticed yesterday my driver side one was dim. After measuring the connector with a multimeter I noticed there were 14v going to the low beam which I know isn't normal. Checked all my fuses (that I could find) and they're all good, anyone have any ideas? Thanks in advance 

Why is 14v too high? An automotive "12v" system really operates at around 13-14.7v.

Not sure why it's dim... I think these trucks use pulse width modulation (pwm) and if the duty cycle is low, that would manifest as a dim bulb and wouldn't likely show up on a multimeter. You need an o'scope to accurately measure duty cycle.

That said, a low duty cycle isn't necessarily a failure condition. It could be the truck is intentionally dimming the lights, maybe for drl, for instance.

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[Mpereira93]

Its never been dim like it is now and the passenger side low beam is bright like it always has been. I tried putting in the original low beam bulb and the bulb began smoking. Maybe 14v is normal, i just found it odd once the bulb started to smoke

[papageoff]

Its never been dim like it is now and the passenger side low beam is bright like it always has been. I tried putting in the original low beam bulb and the bulb began smoking. Maybe 14v is normal, i just found it odd once the bulb started to smoke

Hahaha... Okay then!

 

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To be clear, I'm not laughing at your problem. Sorry.

 

That does sound weird and I have no suggestions there. The fuse should have popped before anything on the circuit gets damaged.

[Mpereira93]

I'll have to try putting the original bulbs back in and testing it out. Thanks for all the help I will let you guys know the outcome! ?