I have taken ownership of a phase 2.5 shell to re-shell my phase 3 rusty old battered 6.
The interior is missing apart from the dash and the wiring loom has been cut in many places, including both sides of the dash.
I have the loom that's been cut and can obviously re solder it together ( i understand the future complications of that task) but I wanted to know what kind of job it is to remove my wiring loom complete from the phase 3 car and drop it whole into the 2.5.
The fuse box looks completely different in both and I also wondered if I could leave the engine bay loom in and still hope to connect it all together and tun the key and everything works?

Im guessing, I need to fully pull out my phase 3 loom for the reshell to work properly but im hoping someone might have time saving advice for me

Thanks

as said ph2 loom is very different
yes even the door looms are different
yes the engine loom is different but interchangeable with sensor swaps
yes the engine bay loom is different
yes the dash loom is different
yes the body loom is different

depends how late the 2.5 is, like Ryan said, it might already have the integrated 2 plug RF type central locking/alarm control unit and transponder.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Found a little box under the ph3 drivers side carpet which the ph2. 5 doesn't have.
Guess it's full loom swap out!

Does the ph3 wiring loom split anywhere around the fuse box before it goes to the engine bay.?

Thank you , that helps my re shell thought process massively!
Unpick all the loom from the shell, from the parcel shelf speaker connection to the larger square plug you just mentioned , then refit it all into my new shell, then new interior in , then work on engine bay and loom..
Cheers