Archive for November 7th, 2023

Nov 07 2023

Indicator and hi-beam lamps self testing

Published by under Tech Talk

Does anybody in OMGC have any ideas why the following is happening on my 1973 MGB?

Car has overdrive available on 3rd and 4th gears when the O/D switch is ON.
All lamp bulbs have been converted to LED with exception of alternator indicator and headlamps.
Overdrive being active involves 2 switches both being ON simultaneously. They are both in the Yellow wire circuit and permit the O/D solenoid to become active.
When this activation is stopped (O/D off and/or out of 3/4 gears) the solenoid deactivates.

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