Join Date: Jun 2016
Location: Sunny Suffolk UK
However your car being a later model unlike mine, you have a safety cut out switch at the bottom front of the engine next to the oil light switch. This energises an LRA Lucas relay under the lower facia knee roll as it gives a ground until oil pressure is made by cranking the engine. You do not get 12v supply to the pumps until that relay loses it's ground on the relay coil.
While this might be correct, my 78 Shadow 11 SU pump, pumps as soon as the ignition is switched on.
On a really hot day, dont get many here, I hear the pump ticking away until carbs are full.
Probably another modification because cranking to get engine oil pressure to allow the pump to operate, good luck and have a very good battery!