Page:
Home > Help Needed / General Tech Chat > wiring up

Alex1340

User Avatar

902 Posts
Member #: 111
Post Whore

Loughborough

4th Feb, 2009 at 11:35:40am

Hi guys.

I'm going to replace the original fuse box with a larger blade fuse box. At the same time I need to wire up two electric fans, is it naughty to wire both on one relay? Or should I have one per fan. Also the electric fuel pump should be on a relay as well??

Rod S

User Avatar

5988 Posts
Member #: 2024
Formally Retired

Rural Suffolk

4th Feb, 2009 at 12:13:43pm


On 4th Feb, 2009 Alex1340 said:
At the same time I need to wire up two electric fans, is it naughty to wire both on one relay? Or should I have one per fan.

What matters is whether the relay/fuse/wiring rating is adequate for the combined current. Read the currents off the two fans, add them and then decide (most relays are either 30A or even 40A)

On 4th Feb, 2009 Alex1340 said:
 Also the electric fuel pump should be on a relay as well??

Any engine with EMS would require it (as the EMS decides when the pump should run, not the ignition switch). If it's a high pressure pump I would use a relay even on a carb'd engine.
However, IMHO, the more important thing - if the pump can generate any real pressure - is to wire it through an intertia switch. Even without EMS there are ways of wiring it (through a relay) that shut it down if the engine stops (ie, using a feed from the oil pressure switch, or the earlier Ford/VW timer relays), but when you really want it to stop is in the event of a shunt.....

Just my opinion....

Schrödinger's cat - so which one am I ???

apbellamy

User Avatar

16540 Posts
Member #: 4241
King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

4th Feb, 2009 at 12:16:00pm

IT's one of those questions, that if you have to ask then you already know the answer...

I would wire seperate relays for everyting. Don't forget you're inertia switch for the pump *happy*

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*

Alex1340

User Avatar

902 Posts
Member #: 111
Post Whore

Loughborough

4th Feb, 2009 at 09:39:08pm

yeah your right. least if evey thing is seperate then if 1 replay goes then the other will be running. Also found this web site which is SOOOOOOOOOOOO much cheaper than others i have found
http://www.vehicle-wiring-products.eu/VWP-...me/homepage.php
Home > Help Needed / General Tech Chat > wiring up
Users viewing this thread: none. (+ 1 Guests)  
To post messages you must be logged in!
Username: Password:
Page: