Add-a-fuse popped while running off-road lights.

So I currently have two pairs of Hella driving lights, and a pair of ditch lights mounted running of an aux blue sea fuse block. Using OTTRAW V1DAG66B toggle switch. The switch's are drawing power from an add a fuse circuit that I tapped off the interior fuse panel located under the dash. The lights are working as expected, however driving home late one night I decided to run all the lights at once, ended up blowing the 20amp fuse from the add a fuse, which killed power to my lights. Any idea why the switches were pulling that much power just for the LEDs to be lit?

 

You probably already did this, but check that the two fuses in the add a fuse are in the right spots? Also 20A fuse for switch illumination is overkill. I'm not familiar with otrattw switches cause I don't use any but maybe consider a smaller fuse? Hope you figure it out!

 

Thanks. I originally had a 10amp which I accidentally blew, and the only other size I had at the time was 20 and higher, so thats what I used and it still popped. Currently running a 25 and it hasn't popped, but then again i haven't ran the lights for long either.

 

Are you not using a relay? Seems a lot of juice to go thru a switch.

 

Yes, I am using 3 relays. One per pair of Hella lights, one for the ditch lights. Trigger from the two hella relays are piggybacked together and ran to one switch in the cabin. So essentially one switch is all 4 of my hella roof lights, and one switch is being used for my ditch lights.

 

is it possible you have one of the relays wired wrong? one of them may be pulling juice from the switch instead of the battery.

Not sure what your definition of the trigger being piggy backed together menas...
please clairify.

Power from the switches should only be going to pin 86 on the relays.

 

This was my original line of thinking. I plan on checking this tomorrow when I get some free time.

The two relays that operate each pair of hella lights have one wire running to a toggle switch so that the one switch can operate all 4 lights. I believe pin 30 gets power from the main fuse block and 86 is running to the switch but I will double check.

 

Finally have time for an update. So I finally pulled a relay to confirm the pin output. The diagram that hella provided is slightly different from the relay I received. In other words I had two of the pins that needed to be swapped. Notes below. Lights are running off a 7.5a fuse without issue at the moment. Thanks everyone for your input

 

Yeah it does look like the power was being pulled through the switch.

 

Alright, good to hear you got it sorted out.