Fed Interior Lighting Circuit

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Fed Interior Lighting Circuit

Postby dunnlor » Wed 18.03.2026, 02:16

I have determined that a battery drain issue in my Fed Elan is due in part to the interior lighting circuit.
• There is a voltage drop across fuse 14 when the interior lights are off and the luggage lamp removed.
• The interior lights seem to be working properly, dimming to off 10 seconds after the door is closed.
• There is no interior lamps delay module installed (at least not between the direction indicator/hazard flasher unit and heated door mirror timer, as the manual shows).
• Previous posts have said that the Fed interior lamp delay is managed by the logic module, not a separate relay as in the UK version.
• Previous posts have said there is a Fed wiring diagram (sounds different than diagrams in either the MJ or MK manual sections)

Where can I find the Fed wiring diagram?
Can anyone tell me more about how the interior light dimming happens through the logic module rather than the interior lamps delay module?

Thanks, Tom
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Re: Fed Interior Lighting Circuit

Postby dunnlor » Sat 21.03.2026, 17:58

I'm still looking for a wiring diagram that shows the logic module that controls interior (mirror) lighting.
Any help appreciated.

Tom
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Re: Fed Interior Lighting Circuit

Postby peteoddcar » Tue 21.04.2026, 21:27

I don’t have a FED interior lamp circuit.
The S2 EU cars have the switches connected to the alarm module. If the lamps are switching correctly then this would normally mean it’s a good circuit.
Have you tried measuring the current with an amp meter across the removed fuse ?
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Postby peteoddcar » Tue 21.04.2026, 22:54

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Re: Fed Interior Lighting Circuit

Postby donsladek » Sun 10.05.2026, 16:28

dunnlor wrote:I'm still looking for a wiring diagram that shows the logic module that controls interior (mirror) lighting.
Any help appreciated.

Tom


Tom, attached are Electrical Section Sheets and Appendices for the M100. The interior lights for the Fed cars are on Sheet 10.

Sorry I didn't see your post sooner :(

Good luck!
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Re: Fed Interior Lighting Circuit

Postby dunnlor » Sun 10.05.2026, 18:47

Don,
Thanks for the Fed electrical diagrams. I couldn't find them anywhere.

Peteoddcar,
Together with the diagrams, I look at the load across that circuit and see where in the circuit its being pulled from.

Tom
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Re: Fed Interior Lighting Circuit

Postby Tuga2112 » Tue 12.05.2026, 10:20

donsladek wrote:
dunnlor wrote:I'm still looking for a wiring diagram that shows the logic module that controls interior (mirror) lighting.
Any help appreciated.

Tom


Tom, attached are Electrical Section Sheets and Appendices for the M100. The interior lights for the Fed cars are on Sheet 10.

Sorry I didn't see your post sooner :(

Good luck!

now this is something i been wanting to get a hold of because theres some spare plugs every 'here and there' whihc may be mentioned here.

for instance my car has a loose plug behind the carpets in the boot. it happens to be the 3rd brake light plug in the fed cars (at least thats my educated guess) which i used to plug my brake light into and works. but theres a few other connecotrs that this may shed light into (anyone else thinking about those near the coolant reservoir ?)
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