Battery disconnection

[r500_wkd]

I want to remove the battery, check the state of the battery box, clean up what I suspect is a rusty earth connection in the back of the passenger footwell and clean up the Anderson connector as that too is very corroded.

I have Graham Varley's manual so understand how to disconnect the battery, but I'm paranoid about having a problem with things like the dash clock and immobiliser system (META) and end up causing more trouble than I'm trying to solve.

Any useful words of advice or reassurance out there?

[Caddyshack]

See if the cig lighter stays live when the key is off, if it does you can make up a lead that feeds the car with +12v, if not you could have another car battery next to the car and connect to the + and - on the battery leads (just protect the leads from shorting with elec tape - this will keep power to the ECU and clocks...not sure why they would have an issue though as there must be loads of TVR flat batteries out there.

You could also feed in via the fuse box

[Granturadriver]

I remove the dash ECU before disconnecting the battery. I only reinstall the ECU once I have connected the battery to avoid a voltage spike in the ECU. I have not had any problems so far.

[hxc_]

I had a full battery cutoff installed on my Tuscan which I used regularly and had zero problems with any alarms or anything else. I don't think you need to worry.

[stuthemong]

hxc_ said:

I had a full battery cutoff installed on my Tuscan which I used regularly and had zero problems with any alarms or anything else. I don't think you need to worry.

This.

Should be fine, keep your alarm key to hand when reconnecting battery in case alarm goes off!

[The Three D Mucketeer]

Just leave your windows open before you disconnect

[r500_wkd]

Thank you all.

I will get stuck into it tomorrow...

[The Three D Mucketeer]

Oh and leave a door open , because if it's like my convertible , first thing it will do on reconnection is shut everything , but I leave the roof off .

[non_linear]

If your leads are long enough I strongly recommend moving the battery round so the -ve terminal is next to the chassis. There have been cases of the +ve terminal shorting to the chassis via the heat shielding and the car going up in flames. Later cars had this configuration done by the factory.

[Adrian@]

I found it impossible to do the earth/shell cables by myself...I could lock the bolt into the shell's brass bobbin from the battery side and so keep the battery side cables locked up tight, but then because I was tightening the foot well nut and it's cables, the bolt was backing off leaving the cables loose. A@

[r500_wkd]

More top tips. Thanks guys.

[mk1fan]

Door open and window down as stated.

I have just disconnected the battery on multiple ocassions on both the Tam and The Sag. Not had any ecu issues following reconnection.

[r500_wkd]

Job done and no disasters. Thanks all.