aux fan weird stock wiring? early e30

[hot carl]

first off, yes i read the official aux fan wiring thread front to back.

http://www.r3vlimited.com/board/showthread.php?t=210783

have an 85, ac removed, trying to put the aux fan back in to help with cooling after hard driving, traffic, etc. still have clutch fan.
the wiring to the low speed k1 relay isn't right. also, the stock switch is only 5 pin, and all the others i found are 8 pin. i don't have the original switch.

tested continuity and voltage;
tested the high speed k6 relay and it looked good
30 hot
85 ground
86 high temp sender
87 fan

but the low speed k1 looked like this
30 hot
85 low temp sender
86 ground, 4 out of 5 pins on ac switch plug also ground
87 fan

high and low temp senders in radiator get volts and have continuity to relays.
i jumped pins on the relays and got the fan to fire on high and low.
couldn't use the ac switch to activate the fan. wrong switch anyway. tried jumpers from hot to any other pin on plug.
haven't tested the temp senders to see if they will turn on the fan, low probably won't, high probably will.
i pulled the fuse block open to see what was going on, looked fine. not tampered with.
i double and triple checked twice!
i'm goddammed flummoxed.
i really want to use factory wiring if i can, cause it's already there and would work great, if it worked.
heres a shitty diagram;

[vpilarrt]

K1 should be wired the same as K6 (except, of course, using the low temp sender and the low speed fan wire). If you have AC removed the AC switch shouldn't be involved. If you want to use the AC switch as a manual fan switch run find 2 terminals that connect/disconnect with switch actuation and wire switched 12VDC to 1 terminal and K1 pin 86 to the other. K1 pin 86 will now have 2 wires going to it - low temp sender and AC switch.

[hot carl]

that's what i'll probably end up doing. i think i'll bypass the factory relay and just put my own switch/relay setup in, keeping low temp sender and diode. it'll look funky though. i'm not great at making clean wiring setups, that's part of why i wanted to use factory.
it's just so strange to me that the factory wiring isn't correct...

[vpilarrt]

You don't need the diode - its only there so if the low temp sensor trips (so that the fan will come on low speed for extra cooling) it doesn't make the AC start running. Since you have no AC you don't need this.

[hot carl]

good info, thanks for the help guys.
i looked around some more and found that the trigger and ground on the low speed relay are on opposite pins from the high speed one. cut the hot wire from the plug that i was going to use (not gonna use it any more) and pulled the old signal wire from the diode under the fuse box and ran my own wire to the switch. perfect.
still have to fab up some sturdy brackets.