romelo1680

iTrader: (2)

i have an 85 glsse im trying to find out were i need to hook up the greed wire for the fuel pump to start to work

BLACK MAMBA

iTrader: (58)

That green wire needs to go to a 30 amp relay, and from there the relay will feed power to the fuel pump. its on the manual if you have it, if not you can download it from internet.

do not connect it to the fuel pump directly.

rx72c

iTrader: (8)

It goes to pin 85 on the relay

Pin 86 goes to 12V ignitino

Pin 87 goes to 12v+ from the battery or starter motor

Pin 30 goes to the positive of the fuel pump +

romelo1680

iTrader: (2)

And the relay is under the glove box nexts to the old ECM right

flaco

iTrader: (7)

could be

romelo1680

iTrader: (2)

on the 85 the fuel pump relay isn't like the like the newer square type one its it a big metal box

BLACK MAMBA

iTrader: (58)

you need to to use a aftermarket 4 pin 30 amp relay, i wouldn't recommend using the stock relay. when you buy the lt10 new from microtech or a dealer it will come with a relay for fuel pump.

you could find it a local auto parts.
you will have to run , at least 10 gauge wire to pin 87 on the relay straight from the battery positive side

you will also need to run a wire from ignition source to pin 86 on relay

Green wire from LT10 to pin 85 on relay

from pin 30 on the relay you will feed power to positive side of fuel pump.

bumpstart

while all the above is correct and will work,, just pointing out that relays come as 4 and 5 pin , and as changeover types

you need a 4 or 5 pin non changeover relay
pin 30 is typically reseved as the volt supply IN from battery and pins 87 as the supply OUT to the device
( they all work fine when wired vichy versa as in posts above )
i make the distinction here because it is good habit to get these around the right way in other situations when dealing with a changeover or a 5 pin relay

on a five pin relay there is TWO switched ouput 87 pins ,, as you can see when wired vichy vesa,, two switched pin 87s as supply inputs is rather contrary and useless

on a changeover relay there is pins 87 and 87A,, which alternate when the relay is switched
ie power to one device while unswitched,,, and to another when switched


as you can see,, demonstrating 87 is usually intended to be the output,, while the single pin 30 should only be input

similarly,, diode protected relays ( have flyback arrestor inbuilt ) will have the diode on the unswitched side when disconnecting
,, and may not do the job of arresting black EMF on disconnect

here is something i wrote about the matter somewhere else just days ago

romelo1680

iTrader: (2)

ok thank you. now i under