Sonic Boom

iTrader: (11)

I've got 13.9 volts at the battery and 12.9 volts at the pump, should I really lose 1 volt with a brand new loom feeding straight off the battery?
Cheers Rich

borderfox

Would not have thought so really. Did you bring a new earth back also.

Sonic Boom

iTrader: (11)

Ye it's one of Ryan's Looms it's very well made, thats why I can't understand the voltage drop.
Rich

borderfox

Not sure then. I made a loom for my saff and im getting more or less the same voltage at the pump as the battery.

Sonic Boom

iTrader: (11)

Anyone else got a view on this?
Cheers Rich

jon@work

iTrader: (5)

where have you earthed the pump ?

what size earth wire ?

Sonic Boom

iTrader: (11)

It's one of Ryans Looms so the Earth and the Live both go direct from the battery to the pump via a 30amp fused relay (relay activated via old pump live Black and Red Wire)
Not sure of the actual size of wire.
Cheers Rich

tabetha

It is a bit higher loss than I would have expected, but if 12.9 at idle, that's fine, will go up slightly on move, and pump is designed for 12.0v, so will be up to max output no problem.
There'll be nothing wrong with loom if it's a ryan loom.
tabetha

StephenC

is it worth checking voltage at either side of new relay?