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Bosch 044 Wiring Setup

cheegar

By cheegar,
in Engines & Forced Induction

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cheegar Collaborator

cheegar

Posted
Posted

Gday all my names Chris and i plan to run an 044+surgey and im a bit stuck with the wiring. (ive searched and couldnt find anything i could understand)

First of all i don't really understand the use of a relay, (i know im a noob flame suit is already on) i've googled and what not but i still dont see the necessity?

If anyone has a wiring diagram or their own setup they could help me with that'd be greatly appreciated.

Cheers, Chris

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James_03 Mentor

James_03

Posted
Posted
Gday all my names Chris and i plan to run an 044+surgey and im a bit stuck with the wiring. (ive searched and couldnt find anything i could understand)

First of all i don't really understand the use of a relay, (i know im a noob flame suit is already on) i've googled and what not but i still dont see the necessity?

If anyone has a wiring diagram or their own setup they could help me with that'd be greatly appreciated.

Cheers, Chris

So you don't understand how to do it, yet you find the use of a relay un-necessary?

Yeah people just spend more time wiring them in for nothing, so you should be right to skip it.

J'z-R33 Grand Master

J'z-R33

Posted
Posted

Stolen from GTR.co.uk, this is how I set up mine..

I havent read your threads in depth, but... To "hard wire" your pumps via a relay, Which is what i did. You run the earth directly to battery, or a very good body earth (Use wire that is capable of delivering 15amps+ per pump.)

Get a 4 pin relay ( ive got a 30 amp relay, but Im only running one HKS pump. Higher amp relays are availiable) The pins on a 4pin relay, are numbered 85,86,30 and 87. Pins 85 and 86, are for the switching windings and 30,87 is where your current runs through.

Take your permanant live wire directly from the battery, and connect it to pin 30. From pin 87,wire to the live side of the pump.

Pin 85 should go to earth (5, or 8 amp wire).

Connect the original pump live to pin 86 on the relay. Done. Mount the relay so it looks good.

A standard pump uses approx 5amps on tick over, so allow 15 for a proper one. put a fuse in the main live. 20amps per pump id say, and use the same amp rated wire you use for your earth. you could run one, or two relays it depends what you want to do.

This method allows the ecu to switch the pumps as intended.:rofl2:

Have a read of this too, explains how relays work.

http://electronics.howstuffworks.com/relay2.htm

Cheers,

Johno

cheegar Collaborator

cheegar

Posted
  • Author
Posted

haha cause its so much easier to have a go at someone than actually explain it.

50+cool points to you bloke.

I didnt say they werent a neccesity i just dont understand why their needed.

Ive read that and it doesnt say why you should run a relay as opposed to just running a direct wire feed.

btw i dont mind if you come in here and be all like "your a dickhead you dont know anything im number 1 internet warrior look at meee" it just proves what sort of person you are.

Cheers for trying to help though Jonno :rofl2:

cheegar Collaborator

cheegar

Posted
  • Author
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http://www.honda-tech.com/attachment.php?a...mp;d=1242243631

Heres a diagram of what you pretty much just said johno.

Anyways i've had more of a read and im starting to understand the application of a relay cheers johnno

R33 Sleeper Community Regular

R33 Sleeper

Posted
Posted
haha cause its so much easier to have a go at someone than actually explain it.

50+cool points to you bloke.

I didnt say they werent a neccesity i just dont understand why their needed.

Ive read that and it doesnt say why you should run a relay as opposed to just running a direct wire feed.

btw i dont mind if you come in here and be all like "your a dickhead you dont know anything im number 1 internet warrior look at meee" it just proves what sort of person you are.

Cheers for trying to help though Jonno :D

ouch!!

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted
http://www.honda-tech.com/attachment.php?a...mp;d=1242243631

Heres a diagram of what you pretty much just said johno.

Anyways i've had more of a read and im starting to understand the application of a relay cheers johnno

The two main reasons for using a relay are

1. minimising voltage drop - using heavy cable shortest route between battery and load (pump)

2. Allowing all the other wiring and switches in the circuit except the relay to be relatively low amperage (inside the ecu etc)

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