LED Dome Light Install

[pbrstreetgang]

Ran a search and could not find anyone having this issue

Had the bright idea to buy and install a 48 led overhead (dome ) light in the M1009. I thought I could get away cheap and simple by using a wire splice connector on one of the wires going to the one existing courtesy light up under the dash. That way when I turn my headlight knob to turn on the under dash courtesy light, the overhead would conicide. Not so.

Tried it 2 different ways. One way the light stayed on and the other way worked completely opposite from the underdash light, when it was on, the dome was off and vice versa.

Any suggestions

 

[ragedracer]

My guess would be that it's not wired like you expect. I'm not sure, and I'm just throwing this out there. The switch might actually complete a ground rather than a 12v+. In other words, you need to have an "always on" hot wire going to the light, and a ground going to the switch. You could check this at the existing bulb. See if there's 12v there even when the switch is off.

 

[Recovry4x4]

My guess would be that it's not wired like you expect. I'm not sure, and I'm just throwing this out there. The switch might actually complete a ground rather than a 12v+. In other words, you need to have an "always on" hot wire going to the light, and a ground going to the switch. You could check this at the existing bulb. See if there's 12v there even when the switch is off.

Bingo! The circuit is completed by completing a ground. 12V+ is there all the time!

 

[zout]

not familiar with that switch. The led's power wire is usually the colored wire - black or blue. The white wire should be the ground from the led.

probe the switch wires coming out - find out which circuit gets power once the switch is turned on in the position you need it to be - and cuts power once turned off.

 

[topgun217]

Please post a pic of your work, I'm thinking of the same thing but was skeptical.

 

[zout]

The pic of all the interior LED's are towards the end of over 627 pictures posted on the build of the trucks.

Look towards the end of the thread within the last couple weeks.

 

[Warren Lovell]

I got a dome light from Napa. It also has a switch on the dome light to turn it off, just in case you don't need all that light. It isn't an led light and was cheap.