Roof Lights on 1500

[diyer2]

Did you use LED roof lights? They draw less amps.

[Morgan McGinnis]

5 minutes ago, diyer2 said:

Did you use LED roof lights? They draw less amps.

Yes I did, factory ones. They keep blowing 10amp fuses in the add a circuit. But the strange thing is, it keeps blowing the fuse for 42, so I lose all of my marker lights on the truck but the roof lights stay on. What size fuse should I be using? The factory is 10amp for RH markers.

[Naughty Donkey Performance]

So, the add a fuse needs to be installed so that the original fuse is still primary and the "add a fuse" is secondary in the circuit, is that how you have it plugged in?

[Morgan McGinnis]

1 minute ago, Naughty Donkey Performance said:

So, the add a fuse needs to be installed so that the original fuse is still primary and the "add a fuse" is secondary in the circuit, is that how you have it plugged in?

I believe so, I used a 10amp fuse to replace the factory fuse in 42 and a 10amp fuse for the roof lights in the add a circuit. 

[Naughty Donkey Performance]

If the add a fuse is in properly the roof lights cannot work if the park lights do not, try swapping that first.

[LowUfo]

I have the factory LED lights on mine.  Connected to the "park lights" .  Something like a 5 Amp fuse.  No problems

[LowUfo]

On 2/19/2024 at 7:14 AM, Naughty Donkey Performance said:

So, the add a fuse needs to be installed so that the original fuse is still primary and the "add a fuse" is secondary in the circuit, is that how you have it plugged in?

Yes.  The "add a fuse" is a smaller amperage that the original fuse, so it will blow first if there is a problem  (no problems at all)