Is your SGII in a safe location?
Megageek
Joined: Aug 2005
Posts: 185
From: CT
Re: Is your SGII in a safe location?
How long have you been using the charger? If you use that every day, you may never know that it's starting to lose capacity. If it shorts out, you have no warning no matter what! My last two had shorts. You can't even jump start a battery with shorted plates from a single good battery. Tow trucks have several in parallel which can overcome a short.
Imported from Detroit
Joined: Apr 2009
Posts: 1,051
From: Michigan
Re: Is your SGII in a safe location?
The 12V battery isn't needed to start the ICE directly. It only energizes the HV relay and the main pack runs the traction motor to start the ICE. Still a good point about always leaving it on a trickle charger. Unless there is a problem, the 12V battery should hold a charge for weeks to months.
Last edited by wptski; Jul 4, 2009 at 02:35 PM.
Megageek
Joined: Aug 2005
Posts: 185
From: CT
Re: Is your SGII in a safe location?
You're right, I wasn't implying that the 12V battery isn't used for anything other than the relay. I just meant to point out that the 12V battery is NOT used to actually start the ICE.
Imported from Detroit
Joined: Apr 2009
Posts: 1,051
From: Michigan
Re: Is your SGII in a safe location?
What's the CCA of the battery used in the FEH?
Imported from Detroit
Joined: Apr 2009
Posts: 1,051
From: Michigan
Re: Is your SGII in a safe location?
Why all the CCA if it's not used for starting????
Megageek
Joined: Aug 2005
Posts: 185
From: CT
Re: Is your SGII in a safe location?
It's still used to run all the 12V accessories, and there are more of them on these vehicles than conventional vehicles. The water pump and power steering and power brakes are all electric. The only thing that is direct off the ICE is the AC compressor. The 12V battery is used for all those items instead of starting the ICE. Some of those need power even when the ignition is off and the HV pack is isolated, mainly the power brakes which we hear pumping up as soon as we open the door, and the water pump and radiator fan which can run after the ignition is off if the coolant is still too hot. Hence the need for a beefy 12V battery.
Imported from Detroit
Joined: Apr 2009
Posts: 1,051
From: Michigan
Re: Is your SGII in a safe location?
It's still used to run all the 12V accessories, and there are more of them on these vehicles than conventional vehicles. The water pump and power steering and power brakes are all electric. The only thing that is direct off the ICE is the AC compressor. The 12V battery is used for all those items instead of starting the ICE. Some of those need power even when the ignition is off and the HV pack is isolated, mainly the power brakes which we hear pumping up as soon as we open the door, and the water pump and radiator fan which can run after the ignition is off if the coolant is still too hot. Hence the need for a beefy 12V battery.
Ridiculously Active Enthusiast
Joined: Jan 2009
Posts: 863
Re: Is your SGII in a safe location?
Ford publishes an aftermarket modifiers guide at this URL:
http://www.motorcraftservice.com/VDI...D_complete.pdf
In it you'll find some pages that talk of how to mount things so that they don't interfere with airbag deployment.
http://www.motorcraftservice.com/VDI...D_complete.pdf
In it you'll find some pages that talk of how to mount things so that they don't interfere with airbag deployment.
Thread Starter
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Ridiculously Active Enthusiast
Joined: Apr 2008
Posts: 895
From: Los Angeles
Re: Is your SGII in a safe location?
Ford publishes an aftermarket modifiers guide at this URL:
http://www.motorcraftservice.com/VDI...D_complete.pdf
In it you'll find some pages that talk of how to mount things so that they don't interfere with airbag deployment.
http://www.motorcraftservice.com/VDI...D_complete.pdf
In it you'll find some pages that talk of how to mount things so that they don't interfere with airbag deployment.
