Hotwired IC Pump Wiring Problem

[odium]

When I bought the Ty, it had an upgraded intercooler pump that looks like it was installed by a nice speed shop. When I first got it, I would turn the ignition on without starting the engine, it would prime for about 1 second and then turn back off (it would growl at me). When I started the truck's motor, the pump would be constantly on.

Recently, a wire was disconnected from the pump going somewhere near the distributor. I can NOT find where it was going to in order to make it prime. I'm assuming it was wired to a pressure switch or something? I tried figuring out what relay to use, but none of them tested on then off when the ignition was turned on.

If anybody knows of any kits that wired pumps similar to this, or know where the pressure switch (if that's what it's using) would be, let me know. Right now it is hotwired so it runs any time the ignition is on. I want to do it a little more professionally again.

 

[InvisiBill]

I don't have a picture of it, but one of the relays on the firewall near the distributor is the IC pump relay. The standard hotwire is done by simply T-ing into the yellow wire and grounding it. That will make it run whenever the truck is on. I believe it's the only yellow wire in either of the relays.

Note that the stock chip doesn't turn the IC pump on until the coolant is at 184F (84.5C) and MAT is 114F (45.5C).

 

[odium]

It is an aftermarket chip, and it was wired to operate like above. Growl when ignition on, stop. Then when the truck was actually turned over, it would run fulltime.

 

[odium]

Does anybody else have thier intercooler pump wired like this or know what to do in order to fix it? I'm not sure what relay Bill is talking about above... I don't like the hardwire anywhere near as much as it was.

 

[TurboTony]

Sounds like it was plugged into the fuel pump prime connector. It would have operated the way you describe.

Look for a single grey wire near the relays above the distributor. I'm guessing that you i/c is an ATR or a copy of some sort that has a male terminal that plugs into the fuel pump prime connector.

If that makes any sense at all.

Tony

 

[odium]

That makes perfect sense. I am pretty sure that is exactly where it should be going to. It has the male plug and I think this may have been an ATR catalog truck at one point in time.

Thanks