Sanity check for seat heaters run off a relay
06-09-2014, 02:38 AM
#1
Drifting
Thread Starter
Sanity check for seat heaters run off a relay
I installed two seat heaters in my 2000 coupe. They run about 3.6 amps at high power. I used a 12 volt SPST 30/40A relay from radio shack (PN: 275-0001) to run the circuit.
I used the ignition-switched fuse-slot 22 in the floor board fuse block to actuate the relay (2 amp fuse). I ran a fused power wire (18 awg) (20 amp fuse) from the main battery terminal of the floorboard fuse block. The fuse is about 6" from the terminal.
Each seat heater has a 10 amp in line fuse. I combined the two and wired them into the remaining lead. The seat heaters powered up. The ignition fuse to the relay held.
Anything sound like a bad idea?
I also added a 30 amp lead from the terminal for future additions. I pulled the fuse and sealed off the end.
I'm trying to avoid running circuits directly off the ignition switch since I have read they are a weak link. My head unit runs off the 20 amp pigtail off the fuse block.
I used the ignition-switched fuse-slot 22 in the floor board fuse block to actuate the relay (2 amp fuse). I ran a fused power wire (18 awg) (20 amp fuse) from the main battery terminal of the floorboard fuse block. The fuse is about 6" from the terminal.
Each seat heater has a 10 amp in line fuse. I combined the two and wired them into the remaining lead. The seat heaters powered up. The ignition fuse to the relay held.
Anything sound like a bad idea?
I also added a 30 amp lead from the terminal for future additions. I pulled the fuse and sealed off the end.
I'm trying to avoid running circuits directly off the ignition switch since I have read they are a weak link. My head unit runs off the 20 amp pigtail off the fuse block.
