blitzpro lights not turning on :/

[Xrunner299]

So I bought 4blitzpro lights, 6d, that I mounted to my roof rack; two on the back and one on each side. I started at the battery, ran 16 guage wire with a 10 amp inline fuse to two otrattw switches, one for back and one for sides. I then ran power to the lights. Each light has a power and ground running to it. The switches light up when I turn the car on, and each switch lights up when I flip it to the on position, indicating there's power coming from the battery. I cut the plug off the blitzpro lights and connected my power to the red wire, ground to black. Didn't work. I switched wires, red to ground and black to power. Nothing. Yes I also checked the fuse, its good.
Is there something I'm missing?? I followed the switch diagram, it's wired and grounded correctly. Maybe my lights are faulty? Which I can't imagine cause you'd think one of them would work. Please shed any insight, maybe point me to a thread where these were installed? They don't draw enough power to use a relay.
Thank you!!

 

[01XterraPhilly]

So when you cut the plug off the lights did you run all the red wires to a single battery ring terminal or multiple? im having a hard time picturing the layout. do you have a fuse relay or just a mini/normal fuse?

 

[Xrunner299]

I ran two lights to each switch. Then each switch through a mini inline fuse to the battery.

 

[lyons05X]

Check your ground on your lights... Make sure it's a clean connection


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[lyons05X]

What is the WAT rating on the lights?


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[Xrunner299]

18 watt each. So 36 watts to each switch. I grounded to the roof rack bolt, which I've heard mixed reviews about. I'd rather change the ground then all the wiring if you think that's it

 

[Intender]

The roof rack is a bad ground. I would pull it back in the engine bay and ground it there.

 

[Xrunner299]

If the ground is bad, will the lights not work??

 

[Intender]

Yes. I assume you dont have access to a volt meter to check this stuff, so we will see if we can figure it out. Best case with the rack, you just get a poor ground and they might work. The metal part of the roof rack doesnt touch any metal on the truck, so they are not grounded at all. If you used one of the screws that holds the plastic feet to the roof you may or may not get a ground. The inside of the holes are painted and the screws have a coating on them to keep water from coming in through the screw holes. Easiest way to test your lights for a bad ground without a meter is to run a piece of wire between the negative side on the lights back to the battery and see if the come on. If so you know you have a bad ground. If not then you either have the leads on the light backwards or your positive wire has a problem. Could be bad lights but the odds of that many being bad is extremely low.

 

[lyons05X]

Need to make sure your switch can handle the amp draw too. The switch should say on it. To figure your amps you take the watts total divide your power source voltage (12v I assume) that will give you your amp draw.


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[01XterraPhilly]

yeah i would check the ground on the lights but also check the connections and make sure they are right on the switch. the switch will light up but the lights wont work. Also definitely try to get a relay between the switch and the inline amp. itll make sure you wont burn up the wires

 

[lyons05X]

I'm not sure o would worry about a relay with only 3 amps of draw


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[TJTJ]

I'd run power/ground to the lights from direct sources (To battery terminals) and see if they work at all, and, if so, then see where my rig's version of that is losing continuity.