[Healeys] Wiring fuel pumps' warning lights

[Alex]

Simon, your scheme as described should work.

Perhaps your lamps are pulling too much current for the fuse rating you're 
using. The current for the lamps adds to the pump current; the total current 
on the switched circuit feeding the pumps is what I'm referring to. The pump 
coils and lamps are in parallel.

== Alex in Maine
     "The Blue Mainie," 1960 Austin Healey 3000 BT7
     "Conkling," 1946 M.G. TC #1321
     Former owner 1957 A-H 100-6, 1967 A-H BJ8,
     1965 MG Midget
     http://home.roadrunner.com/~alexmm


----- Original Message ----- 
From: "Simon Lachlan" <simon.lachlan at homecall.co.uk>
To: <healeys at autox.team.net>
Sent: Friday, July 27, 2012 3:24 PM
Subject: [Healeys] Wiring fuel pumps' warning lights


>I have installed my double ended SU fuel pump. At the moment it is wired 
>via
> the old loom so both pumps are "on" all the time. It works fine.
>
>
>
> My plan is to have both ends wired and fused separately. (I have one of
> those 7-way fuse blocks). When the new wiring is in, I should be able to
> have both pumps on, either pump on or both pumps off.  Wiring that seems
> simple enough...a couple of switches, some wire and off you go. Hey ho..
>
>
>
> In my box of old bits and pieces I've got two old panel lights. One red, 
> one
> green. LHS & RHS. Port and starboard, so appropriately coloured. These
> lights have 2 spade terminals each and are in plastic cases, so are not
> earthed through their cases.
>
>
>
> I thought that I'd connect each light like so:-
>
> One terminal to earth and the other one to the "out" side of the 
> appropriate
> switch. By this I mean the wire that goes from switch to pump and powers 
> the
> pump when the switch is "on". ie there will be two cables at the switch's
> "out" terminal, one to the light and one to the pump. So, flick the switch
> down and power goes to the pump and to the light.
>
>
>
> However, that doesn't work. Wire it like that and the fuse blows..at once,
> out loud, bloody rude. I suppose that I'm making some cardinal error, but 
> it
> eludes me so far.
>
>
>
> Any ideas?
>
>
>
> Thanks,
>
> Simon
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