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Replacing the batteryViews : 900 Replies : 15Users Viewing This Thread : |
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Jan 22nd, 2022, 10:47 | #1 |
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Replacing the battery
I'm about to replace the engine battery with a new one. This should be a simple affair - but my Haynes manual instructs putting the ignition key into position II before reconnecting the leads to the replacement battery. Is this important? My instinct tells me to leave the key out until the battery has been reconnected. Is it essential to do this to ensure all the modules are reset correctly? Haynes manuals are usually a good guide but occasionally don't take account of model updates.
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08 S40 2.0D Powershift SE Lux |
Jan 22nd, 2022, 14:09 | #2 | |||
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for what it is worth the graphics show disconnecting the -ve first and reconnecting it last, and one with your arm Not infront of the steering wheel Or through the spokes,, i know when i have changed/disconnected mine the key was Out, as i always drop the drivers window and put the key on the dash right at the windscreen, saves me playing "hunt the key" or locking it in the car,,,
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940s - 2l / 92 < gone&missed s401.8 xs auto <gone >V50 2.4SE Geartronic aka "the new money pit" "skyship007 has now been successfully added to your ignore list. "." Last edited by andy_d; Jan 22nd, 2022 at 14:13. |
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Jan 22nd, 2022, 14:45 | #3 |
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Thanks for that Andy.
Interesting, so the graphic shows the key in position I not II. Given that the Haynes manual also has a typo in the section i think i'll go with the advice you've posted. I'm thinking that maybe the idea of having the key in position I when you reconnect the battery is that if the air bags are going to deploy it will happen before you get into the vehicle. With regard to disconnecting the earth lead first and (re)connecting last, that's been the practice i've followed for many years and several cars, including when connecting and disconnecting jump leads. I'm going to leave until tomorrow morning now because the car is on the road and i don't want problems with the light fading. Theoretically a half hour job of course, but just in case!.....
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08 S40 2.0D Powershift SE Lux Last edited by froggyted; Jan 22nd, 2022 at 14:55. |
Jan 23rd, 2022, 13:14 | #4 |
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Well, I'm just about to change the battery and will have fingers crossed (not literally of course!) hoping that i don't get any error codes or issues with central locking, power windows etc.
How times have changed since the days when i first started driving and could do basic services on an engine without worrying about ECUs and the like!
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Jan 23rd, 2022, 16:06 | #5 | |
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yes i think (could be wrong) that the pos I setting could have something to do with any spikes/ecu/airbag stuff, i guess the days of "OFF" really being "OFF" ended with all the ecu's being spread all over the cars has to be said tho,, points+condensers with rotor arms and dizzy caps was not as fuel efficient or fuss free *until they go wrong then you need Another computer to tell them they have been fixed,,,
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Jan 23rd, 2022, 18:26 | #6 | |
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Power was disconnected approximately one hour while i faffed about! The biggest problem i had was unclipping and reclipping the front of the battery tray - fingers weren't quite long enough and there was part of a wiring harness in the way. I used a knife-sharpening tool from the kitchen in the end! A good idea is to tie the negative lead to the battery away from the area you're working on with cable ties so it doesn't get in the way when removing and replacing the battery - i used the pneumatic bonnet strut to fasten two joined cables around. I have to admit that, for all their complexity, and expense when they go wrong, i much prefer the electrics in modern cars. For one thing i like my gadgets, and also the ECUs allow for much more sophisticated safety features such as the DST, as well as useful touches such as adapting the engine characteristics to your driving style (something i learned from the Haynes manual whilst doing this job!). It struck me a few weeks ago that i take a lot of the features on this car for granted in comparison with the old Ford Capris i used to have. The heating controls, for example, are just class, like the controls on a hi-fi component, compared with the manual levers that used to need almost brute force to move as the grease on the mechanism got increasingly caked with dirt. I used to do a basic service on my old Capris and lost count of the times i used to readjust the gaps in the plugs, contact breaker and camshaft clearances. I don't think i'd ever want to go back to that. Nowadays i prefer to just enjoy the ride. Thanks again for your help.
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