What exactly doesn't work?
Do you have an FI or carbed car? the FI is much more complex than the carbed...

The easiest way is to just throw this BMW nonsense relay out and connect the fuel pumps directly to relay "S", then you can also remove the wire from the K-Terminal of the coil to the Z-Relay.

142 are the fuel pumps not 67 as mentioned.

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RaymondQV
Countach QV Ex-Mimran #GLA12997, Urraco P300 #20530 sold in August 2008, Jalpa #FLA12203 sold in May 2006
www.countach.ch
www.jalpa.ch

When Frank Sinatra got his Miura S in 1970, he said: “If you wanna be someone, buy Ferrari - If you are someone, you own a Lamborghini”.

I think thats very clever. What senses the two temp levels?

-mick

The temerature pickup at the radiator is a 2 step, same as in the 25th.

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RaymondQV
Countach QV Ex-Mimran #GLA12997, Urraco P300 #20530 sold in August 2008, Jalpa #FLA12203 sold in May 2006
www.countach.ch
www.jalpa.ch

When Frank Sinatra got his Miura S in 1970, he said: “If you wanna be someone, buy Ferrari - If you are someone, you own a Lamborghini”.

But the 25th is just one fan per side. I assume the 25th introduces a resister or something similar for the low setting?

-mick

When you look at the wiring diagram you see 2 wires, each goes to one relay this indicates that first only one fan is switched on, then at 88 degrees the second.
The thermostat switch is ground leaded, this means as soon as it pulls it connects the wire from the relay to ground which causes the relay to switch on.

__________________
RaymondQV
Countach QV Ex-Mimran #GLA12997, Urraco P300 #20530 sold in August 2008, Jalpa #FLA12203 sold in May 2006
www.countach.ch
www.jalpa.ch

When Frank Sinatra got his Miura S in 1970, he said: “If you wanna be someone, buy Ferrari - If you are someone, you own a Lamborghini”.