sluggish starting

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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1.8 8v
Posts: 47
Joined: Wed May 04, 2016 12:34 am
Location: New Zealand

Re: sluggish starting

Post by WillNZ »

You should go around the engine bay and do the same for all ground connections for the loom, especially look for the one hidden by the fuse box. Also, have a look under the RHS front carpet and make sure the large connectors under there are not wet/corroded. When they do get wet/corroded, they cause all sorts of issues with starting/running/electrics... never had a 406 where I didnt find water/damp under the carpet there.

2.0 Turbo
Posts: 267
Joined: Sun Aug 24, 2014 12:18 pm
Location: Netherlands

Re: sluggish starting

Post by frog »

WillNZ wrote:
Wed May 08, 2019 1:32 am
especially look for the one hidden by the fuse box.
That one. Peugeot calls this fuse box the "BSM box". There is a vital, essential, very important ground connector under it.
It is a bit of a fiddle to get the box out of the way to access the ring terminal connector under it.

If i recall correctly, this ground connector is also for the "BSI box", which can get very stressed if it is disconnected from the battery in an uncontrolled way. If you want to take out this connector in order to clean it, make sure to apply the "3-minute rule" ( ... cedure.htm, or just google for "3 minute rule bsi").
Current "fleet":
2003 406 Estate 2.0HDi 110 - 7 seater
2001 Citroen Saxo 1.6i 8v 100

Previously owned:
2000 406 Sedan 2.0 HDi 90
2000 406 Coupé 2.0i 16v 138 - Riviera Blue

PP2000 user, can help with faults / diagnostics in the Netherlands.

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