1984 TType Drive train upgrade question

[Bob-Lob-Law]

My TType is an 84 so in order for me to run the electric fan, I had to use Casper's electronic fan jumper.  Well, when I converted the entire drive train to the 86/87, I installed the Casper's wiring harness but I found that I still have to use the fan jumper as the electronic fan still won't turn on even though the wire harness has the hook up and I'm running an 86/87 ECM.  Do I need to also change the fuse box out in order to not have to use the fan jumper or is there something else I'm missing?  I appreciate any and all help.

[SuperSix]

Do you have the correct relays in place?

[Bob-Lob-Law]

All relays are in place and good

[daveismissing]

This is in?:
http://www.casperselectronics.com/store2/product_info.php?products_id=1436

[ULYCYC]

You have the fan turn on sensor that is located on top of the intake in place and wired?

[Bob-Lob-Law]

Yes, that is what it is, the fan relay kit.  However, I do have the stock 86/87 relays in and connected to the wiring harness.  I just cannot get the fan to run when I plug it into the 86/87 wiring harness.  I have to revert back to the relay kit.

[Bob-Lob-Law]

Yes sir, the sensor is in an wired.

[Bob-Lob-Law]

Would one of the relays being bad prevent the fan from running?

[Steve Wood]

Bob, the fan circuits are pretty simple...the 86/87s turn on low by the ecm as per the temp programmed into the chip.  High speed by the ac pressure or water temp.

here is a link from my site  http://www.vortexbuicks-etc.com/fan.htm

It might be simpler to look at the diagram at the bottom than read all my words...I get carried away with the sound of my own keyboard sometimes

[Bob-Lob-Law]

Steve, thanks for the help, I'll be looking at that this weekend.  

Good to "see" you again.

[Steve Wood]

Same here!