Can anyone direct me to a perm or accessory 12V supply with easy access under the bonnet of my MPi. I've mislaid my test meter and just want to test my fuel pump by shoving 12V up the loom to it. I've already checked the wiring to the pump from the inertia switch and it seems fine but I now want to test the pump itself without having to take the whole bloomin' thing out. Especially as I've just filled up

I know the + on the horn is perm but I don't know the voltage. Are any of the engine bay fuses (4 off located at the front adj. ECU) perm or accessory?
Many thanks!