P38A Pulling connectors

DanClarke · Sep 20, 2019

Sorry to ask what may be a dumb question but..... Is it safe to plug/unplug BeCM connectors with the battery still connected as long as ignition is OFF?

Thanks in advance

Rgds,
Corporal Klutz - Wrecker of Vehicles. ;-)

Mark Piercy · Sep 20, 2019

Personally I would do the battery shut down thing and disconnect it.
It's constantly ALIVE!

RangeRoller dt · Sep 20, 2019

Why risk it with battery connected? If in doubt disconnect battery then no surprises! It’s only radio settings/set windows

Lazy sod

- Sergeant Ralph wreck it

DanClarke · Sep 20, 2019

RangeRoller dt said:
Why risk it with battery connected? If in doubt disconnect battery then no surprises! It’s only radio settings/set windows

Lazy sod

Who? Me?

RangeRoller dt · Sep 20, 2019

We love you really Dan. And your zany humour

Henry_b · Sep 20, 2019

Pull the battery.

Not worth the risk.

Rubberknees · Sep 20, 2019

+1 om what Henry_b says

Rubberknees · Sep 20, 2019

om what hell is om one is what should have come up

RangeRoller dt · Sep 20, 2019

4 : 0 in favour so far

Grrrrrr · Sep 21, 2019

RangeRoller dt said:
4 : 0 in favour so far

F*ck it! Just yank them out and go for it. You can always fix it again!

Depends which ones. As long as you stay away from power stuff I'd think you'd be OK. Are you thinking there is a draw somewhere? Usually people pull fuses.

[Given in BBC style in the interests of balance.]

Datatek · Sep 21, 2019

DanClarke said:
Sorry to ask what may be a dumb question but..... Is it safe to plug/unplug BeCM connectors with the battery still connected as long as ignition is OFF?

Thanks in advance

Rgds,
Corporal Klutz - Wrecker of Vehicles. ;-)

NO!

DanClarke · Sep 21, 2019

OK, I shall disconnect the battery.
Thanks for the responses.

Mark Piercy · Sep 21, 2019

@DanClarke .

DanClarke said:
OK, I shall disconnect the battery CORRECTLY Thanks for the responses.

Dan, don't forget your coat!!

martyuk · Sep 21, 2019

Depends on which connectors. As long as it's not any of the 3 main power feeds, or the main ground feed you should be fine.

In fact there's parts of the BECM SID which mention about disconnecting various things to narrow down battery drain issues, with a multimeter/ammeter connected.

If you're worried about it, pull the battery off. But generally - as long as the ignition is OFF, and nothing is under load (eg headlights on and things like that) then you should be fine.

If you did it with the ignition on, then you might get a few weird things happen as the logic board is expecting various things to happen on inputs (when they change state for example) and pulling the connector with it on will sometimes show as a change in state. But with ignition OFF, you should be OK.

I never recommend doing things like putting the battery back on with the key in ignition II, as that will introduce a sudden load of things like ABS pump and HEVAC blowers along with various other things - and connecting/disconnecting under heavy load is never advisable.

As others have said though... if in doubt... disconnect it

RangeRoller dt · Sep 21, 2019

^^^ this is better answer

P38A Pulling connectors

DanClarke

Well-Known Member

Mark Piercy

Well fumbled member....

RangeRoller dt

Well-Sprung Member

DanClarke

Well-Known Member

RangeRoller dt

Well-Sprung Member

Henry_b

Think outside, no box required.

Rubberknees

Well-Known Member

Rubberknees

Well-Known Member

RangeRoller dt

Well-Sprung Member

Grrrrrr

Technician, Bodgit & Scarper Ltd

Datatek

Well-Known Member

DanClarke

Well-Known Member

Mark Piercy

Well fumbled member....

martyuk

Well-Known Member

RangeRoller dt

Well-Sprung Member

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