Seat heater wiring question

Can I run 2 wires into an add a fuse? The wires are for the switches. The two yellows together and the two reds together? Running the power lines straight to the battery.

 

I hope you have good insurance with questions like these…

 

Seriously though, without any idea what each wire is, where you are putting that add-a-fuse, and the rest of the wiring… Can't help you out.

Secondly are these the "carbon" style heaters or copper wire?

 

Carbon fiber. The two yellow ones are for the switch light and the red/yellow are the on wire for the switch. Kit came with zero instructions.

 

With zero instructions, you probably should bench test these before installing in your truck and crossing your fingers...

 

So there's a relay in there correct?

You are showing us three of the four important wires.. There should be red power (fused) from Batt(+) and Black Ground(-) to bat on one side of the relay. Then relay trigger (suspect it's your red/yellow) and relay ground. Yellow "NightLight" is your switch ill(+).

Draw it out. Test it with a meter. Make sure you hear your relay clicking, and have a fuse in there.
Also hopefully the company builds better heating elements than they do instructions..

 

The heaters didn’t come with its own fuse? Do you know how many amps the 2 seat heater draw (max)?

 

The two fused lines I ran through the fire wall to go to the battery.

 

2 relays each

 

I know I didn't run mine to the battery but I only had a red and black wire. It called for a 10 amp fuse for each side so I did an add a fuse and connected them together to a 20 amp fuse. No issues this is the 2nd winter.

Running to battery they may stay on if you forget to turn the switch off. Mine turn off with the truck.

 

Came with a 10 amp fuse

 

I just did this.

Assuming that your kit is already prewired with relays (an important assumption, and this answer is only safe if each side has two relays**)

Then yes, the on wires go direct to battery with an inline fuse, and can be combined as long as you use appropriately gauged wire. The switch labels can be wired together and need to go to a switched source. Use an add-a-fuse tap to tie these to your cigarette lighter. Your nightlights need to be tied to an adjacent illumination wire. Color depends on model year and switch location.


** Two relays mean that this is the kind of harness that not only switches between hi/low mode (by an admittedly clever alternating of the pads between serial/parallel), but also has a power relay built in. If it's just one relay per side, you need to buy a relay.

 

It does have two relays per harness

 

Yours sounds like mine. That's what I did. I tied mine together, ran an 8G wire to my fuse block, and used a 15A fuse for the pair.

 

Thank you

 

If you don't plan to use a brake controller you can buy the wiring adapter and grab power from it. That way you don't have to go to the battery for power. It also provides the illumination.

I hooked mine up to a small fuse panel and powered the seats from it.