Negetive earth question?

Discuss Electrical problems here.
Forum rules
By using this site, you agree to our rules. Please see: Terms of Use
Post Reply
samheath100
Minor Friendly
Posts: 53
Joined: Fri Feb 18, 2005 10:48 pm
Location: Birmingham
MMOC Member: No

Negetive earth question?

Post by samheath100 »

I am changing my moggy over to negetive earth, Will the elctronic fuel pump be affected by this? I know other things will be affected but I am not sure about the fuel pump. Thanks sam.[/img]
BIRMINGHAM, got a two door moggy 1098cc Check out my pictures at http://www.matmice.com/home/morrisminor

[img]http://www.matmice.com/home/morrisminor/images/rns.jpg[/img]
bigginger
Minor Maniac
Posts: 5928
Joined: Thu Sep 09, 2004 11:01 pm
MMOC Member: No

Post by bigginger »

Welung666
Minor Legend
Posts: 1354
Joined: Fri Sep 24, 2004 7:06 am
Location: West Midlands
MMOC Member: No

Post by Welung666 »

:lol:

I was thinking 'De ja vue' as well :P

Lee
simmitc
Moderator
Moderator
Posts: 4935
Joined: Thu Apr 15, 2004 9:43 am
Location: Essex
MMOC Member: Yes

Post by simmitc »

We've certainly done the standard fuel pump to death, but I spotted the word "electronic" in the question. Generally electronic bits seem to be rather sensitive to polarity. I've seen these units advertsied, but never fitted one. Does anyone have any experience of the electronic pumps?
bigginger
Minor Maniac
Posts: 5928
Joined: Thu Sep 09, 2004 11:01 pm
MMOC Member: No

Post by bigginger »

You specify polarity when you buy them. http://shop.morrisminorspares.co.uk/ind ... 8925a80319
User avatar
d_harris
Minor Legend
Posts: 4388
Joined: Thu Apr 15, 2004 3:52 pm
Location: Sunny Brighton
MMOC Member: No

Post by d_harris »

so you can't just turn it through 180 degrees then??? :lol:

Alec
Minor Legend
Posts: 2148
Joined: Thu Apr 15, 2004 7:29 am
Location: Oswestry, Shropshire
MMOC Member: No

Post by Alec »

Hello Sam,

it seems you have three options, leave it as positive earth, buy a negative earth or standard pump or isolate the pump electrically from the car body (ideally contain it in a plastic box as the body of the pump will be live relative to the car body) and swop the connections.

Alec

P.S. it is worth a look inside the pump to see if an internal polarity change is easy. It will be obvious if it is.
Cam
Moderator
Moderator
Posts: 5109
Joined: Mon May 20, 2002 1:00 am
Location: Stoke-on-Trent, Staffordshire, UK
MMOC Member: No

Post by Cam »

Moved to Electrical..........
samheath100
Minor Friendly
Posts: 53
Joined: Fri Feb 18, 2005 10:48 pm
Location: Birmingham
MMOC Member: No

Post by samheath100 »

thanks lads, sorry but i forgot where i posted this, ive found it now, see ya
BIRMINGHAM, got a two door moggy 1098cc Check out my pictures at http://www.matmice.com/home/morrisminor

[img]http://www.matmice.com/home/morrisminor/images/rns.jpg[/img]
Post Reply