2011 Citroen C4 Electrical

Citroen C4 Problem
The Problem

Sep 11, 2019 (5 months ago)
Car doesn’t start. Wing mirrors will not cycle. Various fault messages shown on dash. Voltage drop on the fuse box above battery. Right hand side (looking from the hood towards the car) reads battery spec voltage. Left hand side (that runs through a fuse on the front of the panel) shows 2VDC.
When shorted across the two terminals (right to left) + to + on the fuse panel, car starts, but ceases to operate once the short is removed. Built in fuse suspected.
I’ve hot wired the two sides together with a line containing a 25amp fuse. What systems are contained on the left side of the panel - I see one heavy wire, what is it?

Car details
Car: Citroen C4
Model Year: 2011
Category: Electrics, ECU, Warnings & Lights

Recalls: Citroen C4 Recalls
More: Citroen C4 Problems
Parts mentioned in this problem
Replies and solutions
Fixes: 12,240
Sep 11, 2019 (5 months ago)
Sorry cant help you with this , really need to get it scanned with Peugeot Planet or Citroen Lexia for fault codes .
Fixes: 1,666
Sep 16, 2019 (5 months ago)
it sounds like you are correct...the fuse is 125amp I believe
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