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MG TD TF 1500 - Electrical Component Wattage

As part of the conversion to an alternator and wiring update I have removed all the internals from the dynamo control box and am using it as junction box. There is a 50 amp wire from the alternator to the "F" terminal on the box. This is connected to the "A1" termal via a fuse hidden under the control box cover. I have fitted relays for the head and auxiliary lamps with heavy duty wires from the "A" terminal to the switch contacts in these. The "A" terminal is also connected to the alternator feed via a hidden fuse. The wire from "A1" to the ignition switch thus has to provide current for the relay coils (minimal), the side lamps (5x5watts), the stop/indicator lamps (3x21watts), the fuel pump (?watts), the coil (?watts) and the wiper motor (?watts). I do not know the rating of the latter three items and my multi meter only reads milliamps. Does anyone know how much power these items consume? Also they are all connected in parallel so can I simply add the amps required for each to work out the rating for the fuse? I have separate wires to the head lamps and auxiliary lamps, both rated at 25amp continuous and protected by 15amp fuses (60watts x 2 divided by 12volts)

Jan T
J Targosz

I looked up in the Lucas Manual.

The Model CW (MG-TD) draws between 1.8 and 2.8 amps, 2.7 to 4 Amps stalled.

Model CR 1.75 to 3.25 Amos (Normal on a wet windscreen)

Model DR-1 2.4-2.5 (Normal)
Model DR-2 2.5 to 3.0 (Normal)

I believe one of the last 3 is for the TF but I don't know.

Jim B.
JA Benjamin

This thread was discussed on 10/08/2014

MG TD TF 1500 index

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