Headlights and taillghts Problems

[Moosemcnally]

So my new trucks headlights and taillights won't come on. the running lights, blinkers, emergency flashers etc... all function but I can't get the lights on. Anybody else run into this problem to give me a headstart? Thanks! This is the weekend project.

 

[helomech]

Don't take this wrong, but is the switch all the way over. The first position is just the turn signals and stuff. The next position turns on the driving lights.

 

[Warthog]

Sure would be nice to know what truck you are talking about without us guessing.

 

[Doug Roberts]

granted , you're on the proper switch position ... if both headlights will not operate , that could be a bad High Beam Selector Switch

 

[Moosemcnally]

Sorry, M923A1. I am sure I am using the switch correctly with the lock lever etc....

 

[Suprman]

If the dash lights dimming switch (bottom left) is all the way down it puts the lights into "park" mode and you won't have headlights. I think all the lights go out in park but I can't quite remember. I have had a hi-low beam switch that was sticky I sprayed wd40 into it and cycled it numerous times and then it worked.

 

[Moosemcnally]

Good news....the switch was loose!!! Victory!... Bad news... Now when I hit my dim/ bright button one headlight does the opposite of the other!!

 

[helomech]

Good news....the switch was loose!!! Victory!... Bad news... Now when I hit my dim/ bright button one headlight does the opposite of the other!!

Sounds like they are wired wrong. Pull them out and see if they are plugged into the correct spot.

 

[goldneagle]

The wires are numbered at the headlights. Make sure the proper wire is plugged into the proper socket. There is a high beam indicator light. With the indicator light on determine which headlight is in low and that is the one that is miswired.

 

[juanprado]

Yup, my m923 had a light wired wrong. Sad thing is those crappy incandescent bulbs are so dim, I did not notice for over a year after I got the truck.......

 

[Moosemcnally]

Got it, found'em, fixed it !

 

[helomech]

So confirming I need to pull the headlight and swap the two wires that aren't ground!

The wires have a metal tag on them with numbers. There are also numbers near each plug. Just plug them into the proper spot.

 

[Moosemcnally]

Thanks for the help,!! A little bit goes a long way in the confidence department when you've never worked on these trucks.

 

[SUPERSPORT]

I like to hear the resolution. So it was wired wrong?

 

[RustyM923]

17 is high
18 is low
91 is ground

 

[Moosemcnally]

Yes it was wired incorrectly. Rustym923 is correct with his numbers