Sebastian
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| posted on 21/11/08 at 05:29 PM |
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Fuelpump Relay.
I am working on my fuelsystem and now i have to put a Fuelpump relay in the loom, i was told that a simple 12v relay was good enough, so i found one i
took out of a Sierra Donor with 5 pins and 12v but how do i know where the pins go to?
It has the numbers 1 to 5 on it and it is a big grey one probably from the rearwindscreen wiper.
Or is there a standard one on the market.
Tips are more then welcome.
Thanx.
Sebastian.
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coozer
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| posted on 21/11/08 at 06:03 PM |
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Has it not go 30, 75,76 etc on it?
1972 V8 Jago
1980 Z750
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Sebastian
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| posted on 21/11/08 at 06:13 PM |
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Not on this one, but i have a box full of them, i do recall seeing one with these numbers but these have only 4 pins, or can you also use this?
Do you have a diagram where these numbers go to then?
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meany
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| posted on 21/11/08 at 06:16 PM |
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this may help.
http://www.vehicle-wiring-products.eu/VWP-onlinestore/relays/relays.php
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meany
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| posted on 21/11/08 at 06:21 PM |
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does anyone know why some ford relays have the pin numbers as 1,2,3,5 etc as opposed to 30, 85,87, etc ?
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Dusty
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| posted on 21/11/08 at 10:53 PM |
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There are different terminal numbering systems in use. Older Din72552 uses 85, 86 for the switching current in and out and 30 for the switched supply
and 87 for the switched output. Newer system, no doubt adopted for greater EU harmonisation substitutes 1 and 4 for switching and 2 and 3 for
switched.
You can happily connect up one of the old ford four pin relays, yellow or red using 85 for earth and 86 for fused ignition live supply. If an ECU is
doing the switching it will switch the earth. If you want a switch on the dash you can switch either or do without a switch and let the ignition live
switch it. Fused battery live to 30 and 87 out to the pump. Consider impact or low oil pressure cut off relays somewhere in pump supply to stop the
pump in case of a crash.
Be aware there are two different layouts for the old relays, some having 85 and 86 opposite each other and some having them adjacent.
[Edited on 21/11/08 by Dusty]
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John Bonnett
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| posted on 22/11/08 at 08:53 AM |
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It never ceases to amaze me the depth of knowledge on this forum. Simply awesome!
John
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britishtrident
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| posted on 22/11/08 at 11:06 AM |
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Usually a lot cheaper to buy automotive relays from Maplin
http://www.maplin.co.uk/module.aspx?moduleno=37526
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