Engine cooling fan overide

[The Hatter]

Snippet of info for anyone considering fitting the above...

My cars have the wiring already in place for this in the loom (both are '86s though). There was a coiled up length of wire next to the horn on the driver's side, tie-wrapped to the main loom. The wiring colours are the same as those fitted to the fan switch in the rad; and when you connect the wires together the fan motor relay cuts in and runs the fan. So... a short length of wire to a switch inside the car and that's it!



Much easier than cutting into the loom behind the relay board; that was my original plan.

[uglymug]

Hi Martin , I did this mod a year ago , but now they dont work , so have to look at another mod to get them working again . Have put a thread on here asking for help in wiring them up , but as always no one has bothered to reply !

[Number 7]

I did the SH mod a few years back, complete with led in the dash to indicate fan on - check out the bible, or let me know if you haven't got one and I'll pull mine out.

[Jack Valiant]

Hi Martin, be a bit careful especially if you are switching a high current supply, you do not want 20 amps on a small switch there should be a relay somewhere doing the high current switching for you.

Chris

[GV]

My solution was to run a new live feed directly from the fan terminal into the cockpit with the earth going directly to the battery neg bypassing the loom completley. I then used an old light master switch to connect up the circuit and a small red LED which comes on when I use to switch the fan off and on when needed. I dumped the otter swtich and blanked it off as it is a crap setup.

You could wire in a relay but IMO it's not necessary. The main thing is that works without fuss and gives you control when you need it. The days of listening out for the fans kicking in with prolonged stares at the temp gaugue are a thing of the past.

[The Hatter]

Chris, these wires are piggy backed onto the otter switch so they're switching the low current side of the relay. I'm thinking I could come up with something to illuminate a warning light if I use a double pole switch.

[wooly350i]

uglymug said:

Hi Martin , I did this mod a year ago , but now they dont work , so have to look at another mod to get them working again . Have put a thread on here asking for help in wiring them up , but as always no one has bothered to reply !

Errm,I have posted on various topics that you have also posted on ug inviting a reply from you matey,but HayHo you didn't bother to reply, wuz it something I said? After all I only wanted to know how you got on with the ecu you had off me,wooly..