PSI Conversion Harness hookup

[PunishedC10]

I have been reading for some time and trying to find some answers. I have a PSI Conversion harness for a ls1/4l80e. For the wires coming out of the bulkhead connector off of my '85 C10, which of these do I tie to the harness?
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The middle wire says I can run to the 12v on my harness. But I need to make sure it has 12v when the key is in the cranking position.

[Jstock85]

The middle should be all you need. The rest should be in the harness. but there are other cats on this board who know a lot more than me and can tell you for sure.

[PunishedC10]

Originally Posted by Jstock85

The middle should be all you need. The rest should be in the harness. but there are other cats on this board who know a lot more than me and can tell you for sure.

Thanks for the reply!

[PunishedC10]

The PSI harness came with one wire from the relay to run to a switched 12v for the ignition relay. It came with 2 pins to add a switched or constant 12v wire for the fuel pump and a wire from the relay to the fuel pump, should I the switched or constant 12v wire to the same wire as the 12v ignition?

[mongocanfly]

I used psi on mine..I used my switched on hot wire that went to my distibutor for my switch on hot..then you need a constant hot as well and the grounds..simple..
The fuel pump runs out of the psi fuse block

[PunishedC10]

Originally Posted by mongocanfly

I used psi on mine..I used my switched on hot wire that went to my distibutor for my switch on hot..then you need a constant hot as well and the grounds..simple..
The fuel pump runs out of the psi fuse block

PSI ran a wire out of your block for the fuel pump? On mine, the 12v wire to the fuse block relay for the pump is not there, neither is the wire to run to my pump. No big deal, but by the time I run those two wires, the two for 12v constant and switched and all the wiring for two efans, I could have just rebuilt the original harness and bought a 4l60e to 4l80e adapter and saved alot of money for almost the same amount of work.
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[mongocanfly]

There's no wire for the pump...in the fuse block there's a terminal and a relay for the fuel pump..it should be in your instructions on how to wire it

[Jstock85]

again don't take me for the gospel but the fuel pump should get the 12v switch power

[mongocanfly]

Here's the thread cago. ..http://www.67-72chevytrucks.com/vboa...d.php?t=726700

[Rich84]

I brought my sender to a local auto machine shop. No delivery charge $10.00

For the fans.. The junkyard is your friend. Factory fan (I used an Escalade) and relays with all the proper connectors $50.00.

[Jstock85]

yes to relays for fans also. I'm scared to drill into a head. I know I have it all jacked up!! Id def try the water pump. If it doesn't go well it won't cost as much to replace. just my op.

[PunishedC10]

I am using 98-02 fbody fans and wiring in my own relays. The radiator and radiator mount are for the big blocks. It's a 4 core I had rebuilt. Check out my build thread if you want to
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