I decided to help some people out with this.

People have wired there iC pumps before. I chose to do it this way because of the added benifit of the fan running when the IC pump is running.


Here is a Wiring Diagram of what I did.


Please note I used a 30amp Fuse connected to the Positive side. of the terminals behind the engine bay cover for the truck wiring.

This mod is meant to give the IC Pump and IC fan separate power sources. So that when the IC Pump turns on, The fan turns on via the relay.

Also you can turn this on in the cooling lanes with the engine off.

Enjoy.

 

correct me if im wrong but,
if the relay has no power, 30 and 87a are connected, when it is tripped, 30 and 87 are connected, so,
say when the toggle switch is tripped (12V going to the relay), the i\c pump and or white wire will be on, but on the other relay, 30 will be an open, since on the first relay 87a is now open and no power goes to that pin. so on the second relay in order for the fans to get power 30 should go to the battery as well..




jim

 

Ok, 87 and 87a are connceted on relay #1.

For example, trip switch power goes through 86 and 85 creating an electromagnet. This pulls down the reed switch conecting 30 and 87/87a. This sends power to the white IC Pump turning it on. Also 87a sends power to 30 on the next relay giving it a charge, when the IC pump turns on it sends a signal to 85, making it close the reed switch in Relay#2. This then sends power to the IC fan cause 30 and 87 are now connceted. Got it?


Also if you connect the wires (85 and 86) backwards, you will get a buzzing sound from the relays. Instead of the magnet pulling, it would push. this cause the reed swithc to slap up and down inside the relay. Just switch the wires if this happens.

 

Nice! Thanks for the idea.

I got a SPAL fan on eBay the other day for $50, time to get busy.

 

NP. Please read my edited post above

Anything to help out.

 

Well since you posted that I have a question I was asking about using a relay and you seem to have it down. How would I hook up a relay to turn on 2 things at once when the key is turned. In my Mustang the new fuel system runs two big bosch pumps side by side. I want to turn them both on using one relay to get them both on at the same time. Could you let me know what wires need to go to what terminals on a relay? Thanks a ton.

 

Go to rad shack, Autozone, Pep Boys, online, etc. Once you get a relay, it will show you exactly to to wire it.

 

What he said. Any outgoing current (current to power your fule pumps comes from 87and87a. If you want to turn on your fuel pumps, basically instead of a switch, you run the wire from 86 to the keyed on source. Then ground 85 to chasis.

 

Thanks, one last question... hooking it up the way you stated, do I still hook up terminal 30 to the battery?

 

You can hook both 30's to the battery, but you have to have them fused. Either 2 separate fuses or tap them into the same fuse before you split them off into the relays. you must have at least a 20 for the Pump relay. and 15 for the other one for the fan.

 

http://pwp.clearsource.net/dsigns/ja...lightRelay.gif

toward the bottom of this link is a internal diagram of most of the relays available at murrays, autozone, etc, they are a spst (single pole single throw switch) it shows with no power 30 and 87a are connected but then the coil is energized 30 and 87 will connect, leaving 87a an open..they are most commonly used with car alarms to lock or unlock doors, so under normal conditions the wire that is stock for lock and unlock is connected to 30 and 87a so the buttons on the doors will operate normally, but when the alarm or remote unlock lock module activates the circuit will send its remote signal to lock or unlock the doors. your diagram will work if the relay is a double pole single throw, dpst...


jim

 

Awesome post QKSILVR
Very imformative
But
I have no problem admitting
This is waaaaaaaay over my head

 

LinDetroit,

You are right about 87a and 87. My bad. That would explain the reason I have it wired up the way I do. I found a better link to how a relay works with 87a and 87.
http://www.eurekaboy.com/f250/relay101.htm

I am not sure which one I got, but it is one that has Blazer packaging used for Foglights.


NummysBLK03,

As far as I know, NOW(thanks LinDetroit), make sure either 87a or 87 has not power when key is off. But when running it gets power