P38A Pulling connectors

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. ;-)

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

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

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

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Who? Me?

We love you really Dan. And your zany humour

Pull the battery.

Not worth the risk.

+1 om what Henry_b says

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

4 : 0 in favour so far

RangeRoller dt said:

4 : 0 in favour so far

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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.]

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

@DanClarke .

DanClarke said:

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

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Dan, don't forget your coat!!

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

^^^ this is better answer