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SADS

Member Since: 28 Nov 2023
Location: Cambridge
Posts: 59

RDX Electric Fan wiring

Hello,

In need of some advice and guidance.

I have a RDX Electric Fan to fit to my 200tdi. Fitting it up should be fine, however i am concerned about the wiring.

It’s not helpful that the kit doesn’t come with any instructions. Is anyone able to give me a step by step guide to wiring? Id like to wire it to an ignition wire, but what am i meant to be looking for to do that?

Thanks in advance

6th Dec 2024 10:29pm

paul 123

Member Since: 10 Jul 2022
Location: norwich
Posts: 84

1995 Defender 90 300 Tdi PU Caledonian Blue

wire it through a relay but i think its best not to ignition switch it (just my opinion) as the fans can run still cooling the engine for a few mins after switching off.

7th Dec 2024 7:46am

SADS

Member Since: 28 Nov 2023
Location: Cambridge
Posts: 59

Hi Paul, thanks for the reply.

Okay, a relay is provided in the kit.

If i dont wire into the ignition, wouldn't the fan be live all the time, or is that where a relay comes in?

Would you be able to do a step by step of what would need to be done to wire it in with a relay please?

7th Dec 2024 8:37am

Mo Murphy

Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2235

1984 Defender 90 BMW M57 3.0 Diesel HT Auto Pennine Grey

Is it on/off or temperature controlled ?
Mo The Land Rover 90 - Many are called, few are chosen.

50 Shades of Pennine Grey

7th Dec 2024 11:41am

SADS

Member Since: 28 Nov 2023
Location: Cambridge
Posts: 59

Temp controlled

7th Dec 2024 1:55pm

Mo Murphy

Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2235

Wire from battery via a fuse through the temp switch to the relay as a trigger. Then a fused supply from the battery through the relay to the fan motor. Earth's locally or back to battery (which is what I do).
Use good quality waterproof connectors to improve reliability.
This way will keep the fan live after you've turned off the ignition but will turn off once lower temp is reached.
Mo The Land Rover 90 - Many are called, few are chosen.

50 Shades of Pennine Grey

Last edited by Mo Murphy on 7th Dec 2024 2:42pm. Edited 1 time in total

7th Dec 2024 2:40pm

paul 123

Member Since: 10 Jul 2022
Location: norwich
Posts: 84

mine is temp controlled i have drilled and tapped the thermostat housing and fitted a sender into it. the wiring is a permanent live to the sender then a wire from the sender to the relay this is the switch wire the other three wires on the relay one goes to earth one goes to a permanent live then one goes to the fan. the fan also needs an earth all permanent lives are fused.i hope this makes sense. mine is in a 2 door range rover fitted with a 200tdi.

7th Dec 2024 2:42pm

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