Ohms Law for your reference.

 

     

Ohms Law

Average Current Draw of Electrical Components

Component

AMPS

Air Conditioner 13.50
Backup Lights 4.20
Clearance Lights - Front 1.18
Clearance Lights - Rear 1.62
Dome Light .97
Hazard Lights 8.40
Headlights 8.40
Heater -Defroster 10.00
Identification Lights - Front 1.77
Identification Lights - Rear 1.08
Instruments 1.00
Instrument Lights .96
Ignition 2.00
License Plate Light 1.18
Marker Lights- Front .54
Marker Lights- Rear .54
Parking Lights 1.26
Radio 2.00
Stop Lights 4.20
Tail Lights 1.81
Turn Signal 4.20
Windshield Wiper - Electric 4.00
Misc Add'l Load 4.00
Underhood Light 2.10
Map Light .97
Glove Box Light .24
Lighted Control Knobs & Ash Tray .34
Cargo Light 1.94