L405 intermittent electrical issue

Ricochet25 · 2025-06-18T10:41:29+0100

2016 405, autobiography has an ever increasing intermittent electrical fault. Initially once a week or so for 2-3 mins, now every time I drive it.

Main control screen switches off, aircon fans stop working and only warning messages that come on are "camera" and "blind spot". All stay off for a few minutes then come back on. Have also noticed the steering has become heavier recently. Any ideas? I originally thought the amp as I replaced it 4 mths ago due water damage but I guess the aircon fans don't go through that???

kermit_rr · 2025-06-18T11:04:23+0100

Initially, when did they start coming on? When you start up? When driving? When stopped at lights etc

Ricochet25 · 2025-06-18T11:52:36+0100

kermit_rr said:
Initially, when did they start coming on? When you start up? When driving? When stopped at lights etc

Hi kermit, initially it occurred when braking during motorway driving. Next time when i braked but moderate braking each time. Since then different each time.

gold rover · 2025-06-18T14:51:52+0100

Ricochet25 said:
2016 405, autobiography has an ever increasing intermittent electrical fault. Initially once a week or so for 2-3 mins, now every time I drive it.

Main control screen switches off, aircon fans stop working and only warning messages that come on are "camera" and "blind spot". All stay off for a few minutes then come back on. Have also noticed the steering has become heavier recently. Any ideas? I originally thought the amp as I replaced it 4 mths ago due water damage but I guess the aircon fans don't go through that???

"Main control screen switches off, aircon fans stop working and only warning messages that come on are "camera" and "blind spot". All stay off for a few minutes then come back on. Have also noticed the steering has become heavier recently"

Might be easier to start with the simple. The above is what happens with my L322 when the battery is unhappy. She does it intermittently until either battery is charged by driving, or a new batttery put in. If you're not giving yours the mileage/ charging time after each start it might be a similar issue.

Datatek · 2025-06-18T17:20:43+0100

Dodgy ignition switch maybe?

Mark Piercy · 2025-06-18T22:51:11+0100

Datatek said:
Dodgy ignition switch maybe?

You're developing an ignition switch fetish young man

L405 intermittent electrical issue

Ricochet25

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kermit_rr

Very

Ricochet25

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gold rover

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Datatek

Well-Known Member

Mark Piercy

Well fumbled member....

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