wiring from scratch 93 mustang

hi,

for the rear lights, to keep it simple, use a dual filament bulb.

to get an idea of what a particular item draws, check owners manuals (fuses section) and/or fuse box labels.

going oversize on wiring gauge reduces voltage drop, but increases weight.  

a wiring diagram manual may show gauge sizes used on particular circuits. 

if you consolidate too many circuits on one fuse, and have a failure in the wiring.. i.e. short circuit, you'll probably lose all operation of all circuits on that fuse.

m

remember the fuse is to protect the wire,  the load comes second...so

Headlamps...if the switch is only controlling the relay coils,  a 3 amp fuse is fine.  18 ga to the relay coils.  16 ga on the contacts.\

Turn Signals.. 15 amp fuse, 16 ga wire.

Brake Lamps.. 15 amp fuse, 16 ga wire.

Tail/Parking Lamps..  10 amp fuse, 16 ga wire.

Dome Lamp..  15 amp fuse, 18 ga wire.

Radio.. 2 Circuits.. Accessory power 5 amp fuse, 18 ga wire.  Battery power, use dome lamp fuse, 16 ga wire.

Gauge Illumination..  5 amp fuse, 18 ga wire.

Ignition Switch.. 30 amp fuses, 10 or 12 ga wire.\

Bottle Warmer.. depends on power draw  15 amp fuse? 16 ga wire  20 amp fuse? 14 ga wire

Shifter light..  connect to parking lights or radio accessory... fuse value can remain the same.

m

I guess do each thing on it's own circuit to make things easier when something happens? So I need like a 10 circuit fuse box then to cover the body. The engine will have it's own fuse box. Thanks a lot for your help, it really helps out.