Total electrical loads, listed by "fuse" assignment:
"RED" fuse
Parking lamps 2 X 5 Watts =
10 Watts = 0.8 amps
Marker lamps 4 X 4 Watts =
16 Watts = 1.3 amps
License plate lamps 2 X 6 Watts =
12 Watts = 1.0 amps
Tail lamps 2 X 5 Watts
= 10 Watts = 0.8 amps
Instrument lamps 8 X 2.2 Watts =
17.6 Watts = 1.5 amps
TOTAL = 5.5 amps
"GREEN" fuse
WS wipers 1 X 14 Watts
= 14 Watts = 1.2 amps
WS washer 1 X 7 Watts
= 7 Watts = 0.6 amps
Brake lamps 2 X 21 Watts =
42 Watts = 3.5 amps
Reverse lamps 2 X 21 Watts =
42 Watts = 3.5 amps
Fuel gauge 1 X 2.4 Watts
= 2.4 Watts = 0.2 amps
Temperature gauge 1 X 2.4 Watts =
2.4 Watts = 0.2 amps
Heater fan 1 X 48 Watts
= 48 Watts = 4.0 amps
Turn signals 2 X 21 Watts
= 42 Watts = 3.5 amps
TOTAL = 16.7 amps
"PURPLE" fuse
Horns 2 X 30 Watts
60 Watts = 5.0 amps
Hi-beam flasher 2 X 50 Watts
100 Watts = 8.3 amps
Hi-beam flasher ind 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Hazard flasher 4 X 21 Watts
84 Watts = 7.0 amps
Glove box lamp 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Trunk lamp 1 X 3 Watts
3 Watts = 0.3 amps
Key lamp 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Tunnel lamp 1 X 6 Watts
6 Watts = 0.5 amps
TOTAL = 21.6 amps
"UN-FUSED" circuits
Low beams 2 X 40 Watts
80 Watts = 6.7 amps
High beams 2 X 50 Watts
100 Watts = 8.3 amps
High beam indicator 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Low oil press lamp 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Brake failure lamp 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Ignition lamp 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Ignition coil 1 X 36 Watts
36 Watts = 3.0 amps
TOTAL = 18.7 amps
SUB TOTAL = 62.5amps
Minus Duplicates - Hi beams and indicator
lamp =
8.5 amps
GRAND TOTAL = 54.0 AMPS
"Worst case" constant loads:
"RED" fuse
Parking lamps 2 X 5 Watts =
10 Watts = 0.8 amps
Marker lamps 4 X 4 Watts =
16 Watts = 1.3 amps
License plate lamps 2 X 6 Watts =
12 Watts = 1.0 amps
Tail lamps 2 X 5 Watts
= 10 Watts = 0.8 amps
Instrument lamps 8 X 2.2 Watts =
17.6Watts = 1.5 amps
TOTAL = 5.5 amps
"GREEN" fuse
WS wipers 1 X 14 Watts
= 14 Watts = 1.2 amps
Fuel gauge 1 X 2.4 Watts
= 2.4 Watts = 0.2 amps
Temperature gauge 1 X 2.4 Watts =
2.4 Watts = 0.2 amps
Heater fan 1 X 48 Watts
= 48 Watts = 4.0 amps
TOTAL = 5.6 amps
"UN-FUSED" circuits
High beams 2 X 50 Watts
100 Watts = 8.3 amps
High beam indicator 1 X 2.2 Watts
2.2 Watts = 0.2 amps
Ignition coil 1 X 36 Watts
36 Watts = 3.0 amps
TOTAL = 11.5 amps
GRAND TOTAL = 22.6 AMPS
See part two for an explaination of this data.
Dan Masters,
Alcoa, TN
'71 TR6---------3000mile/year driver, fully restored
'71 TR6---------undergoing full restoration and Ford 5.0 V8 insertion - see:
http://www.sky.net/~boballen/mg/Masters/index.html
'74 MGBGT---3000mile/year driver, original condition - slated for a V8 soon
'68 MGBGT---organ donor for the '74
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