Already Blown One Rule-Mate Electronic Auto Bilge Pump !

[surfmachine]

Hi, replaced my auto bilge pump set up in the motor bilge, normal pump wired via a float switch, with a fancy electronic self contained rule-mate pump. Already blew one up with wrong wire connections, has warnings about not connecting brown wires to earth.
Problem is, I have a three way switch, with a fuse and led's for auo/off/manual mode that supplies the power and three wires comjing out the back, 1 red, 1 red, 1 white. I dont know which one is the auto?
I connected them up as per the old pump and it just blows fuses and wont work!
I would think that the black is earth, red is manual on and white is for auto, or do I need a completely new switch?
The new pump has 3 wires, black earth, brown automatic, brown/white manual.
Please help!

[holomoku]

I installed the same pump not long ago in my boat. I have a 3 way switch as well and it is working. First check that your new pump matches your boat voltage. Most are 12 volt but some are 6 or 24.

I was not sure about wire colors on my boat either so I did some testing first with a voltmeter.

I disconnected the old pump.
Assumed Black was ground.
Set the switch to "off"
Hold the negative lead on the volt meter on the black wire.
Check voltage to the red and then white with the voltmeter positive lead.
Should read 0.
set switch to auto
Check voltage to the red and then white.
One should read 12v. That's the auto wire.
Have a helper push the manual button.
Check voltage to the red and then white.
One should read 12v when helper pushes the button.
That's the manual wire.

[Captin_Kirk]

the white is the positive feed in, the other two red hook up to the bilge. One for the auto and one for the manual. The black of the bilge goes to the battery or motor.

Only one side of the circuit goes through the switch.

[surfmachine]

Cheers Captain Kirk and Holomoku, got the new pump all working great, it's very quiet! Rechecked everything from the back of the switch, the white is automatic positive, red is manual positive, and of course, black is negative, but by the time they get to the bilge the colours have change, to 2 black and 1 red.
But, a happy ending, Thanks guys!
Fair winds from Keith.