I am about to replace my seats with leather seats that have heating elements. Does anyone have a suggestion as to which circuit I should tap into to power these seats? Thanks!

I would create a new circuit with heavy duty relay and fuse, that way no existing circuits are overloaded. Run an appropriate gauged wire direct from the battery with the correct fuse or fusible link in line and then on to the high amp side of the relay and out to the heated element of the seat. Run your switch to the other side of the relay and power it via an extra fused terminal in the fiero fuse box. The switch side of the relay would have low power draw

[This message has been edited by Erik (edited 07-24-2006).]

I think I'd at least use one with at least a 20 0r 25 amp fuse. You could put an in-line fuse at the end of your wiring then plug it into the fuse box in one of the empty slots - either one that powers with the key on or one always hot.

quote Originally posted by PaulJK: I think I'd at least use one with at least a 20 0r 25 amp fuse. You could put an in-line fuse at the end of your wiring then plug it into the fuse box in one of the empty slots - either one that powers with the key on or one always hot.

The only problem I would have with that is worrying about possibly overloading an existing circuit due to the high power draw of the heated element which could blow a fusible link. Of course one could put a bigger fusible link in the system as well. Regardless, I would definately run a heavy duty relay to isolate the switch from having to have much current running through it

Just wondering? What are these seats out of?

The fuse will blow long before a fusable link, protecting the fusable link. Assuming his seats are out of a factory-built car of some kind, the heaviest fuse I've ever seen in any car has been 30 amps, unless the seats themselves have some type of protection built in. He could always test them first using a direct lead to the battery with an in-line fuse and trial-and-error a number of fuses.