HELP - how to wire up a fuel pump

[mike1980ra40]

Hi people ...
Ok, i got the 87a sussed, silly me ...
I was looking at the diagrams and fired up turbocad and think i got the
pins worked out when it was mentioned before when they weren't quite right.

if theres anything not quite right let me know and I'll edit the image.

cheers.

Edit: march 19.
image deleted. neither circuit works in my car . checked and double checked.

[Rosey]

Next Question:
The diagram I have drawn up shows an inline fuse between the battery and the relay. THis is the only way I know how to do it. But, I already have two wires with fuses hooked up to my battery terminal. One is for for my headlights (I dont know why they did it like this but I dont know how to fix it/have been lazy) and one for my amp. If i hook up the fuel pump that will be three. Soon I want to hook up a thermo fan... then there were four.... and the list goes on....

Is there a way I can set up my own fuse panel hidden in the engine bay so that I can have one wire to the battery terminal and run all the relays from this panel? it seems like the obvious solution but I dont know how to go about it....

Dana I found what you are looking for in a truck shop in Ipswich the other day if your still interested. Give us a holla .

[sillycar chick]

Cool! Do you know how much they were?

Im trying to save up to fix critical things on my car(s) at the moment i'll grab the details when i get around to it

[Rosey]

I think I saw $21 for an 8 fuse holder with one battery in.

[mike1980ra40]

I ordered I similar thing from an auto store down the road today, Its a Narva fuse block (blade
type) Cat no 54430, $18, one heavy battery in 6 outs and rated to 30amp. they have the 8 out
as well for a few $'s more.

[sideshow]

have a look at ashdowns website

ashdowns is a well known shop for electrical supplies in sydney

i have bought 5 and 10 fuse fuseboxes

the 10 fuse ones have 5 for batt and 5 for ign

i use these for most older cars

for newer cars i use some from painless which are 15 or 18 fuses

beware of some fuseholders like narva they have the spade terminals on the side

they are ok but for no hassle down the track i alsways like fuseboxes with wires coming of the terminals

i do not like the slip on terminal type

they are ok for most jobs but if any terminal gets sloppy then i get bad connection then u get phones calls and whinging

but if anyone is interested i can order a bag of fuseboxes from ashdowns

[Rosey]

Nice work mate looks the goods now, I will be installing these ideas over the weekend.
+rep
THANKS FOR THE GOOD IDEAS...

Hi people ...
Ok, i got the 87a sussed, silly me ...
I was looking at the diagrams and fired up turbocad and think i got the
pins worked out when it was mentioned before when they weren't quite right.

if theres anything not quite right let me know and I'll edit the image.

cheers.



Edit: I have revised my diagram (based on witzl's) and the only difference is that pin 30 and
87 (2nd relay) on mine is the other way around coz i thought 87 is out and 30 is in, thats
all. While i was at it I added warriors idea for a starter booster at the same time. thanks to
rosey for pointing something out too

[mike1980ra40]

Hi people, I followed the fist diagram that timbo was explaining, to the letter.
problem with mine is when IG is on pump is pumping and when the engine is on
and oil pressure is normal the pump switch's off. then engine stalls. so the diagram
works well only its backwards on my car.<scratch head>

I'll double check what I've done later on tomorrow, I've probably got a wires somewhere backwards on the relays.

cheers.

edit. see post above. tried the first diagram by timbo, no joy.

[andurils_sheath]

Hey guys, i think the problem with this system is the standard oil pressure sender is grounded at no pressure and as the pressure rises so does the resistance to ground. So thats why things are going in reverse. Unless ive missed something totally??

[mike1980ra40]

+rep for that one hey ....
That makes sense hit the nail on the head i think. theres something to work on. cheers.

[mike1980ra40]

I found this the other day, seems like it might be a better option and something worth looking
into. bosch VW fuel pump relay.

http://dinsen.net/murena/electrics/fuelpump

cheers.

[Squid]

Why not tap off the wire to your radio that turns it on with the Ignition. They all end up at the same point.

As for the wiring diagram that should work.

If you wanted to get fancy you could modify the wiring and make it a latching relay with a momentary switch. Meaning once the car is turned off you would have to Push the button again to start it. (Self enguaging)

Sorry no one else seems to have commented on this.

You are a bad man, why would you hook something up to the inncorrect wire, when connecting it to the correct one is in reality no harder. This is going to create a problem for someone diagnosing the problems in your car down the track, it could also mean that you need to use an incorrect fuse to get both working.