Has anyone managed to get the HV battery warmer to work with 2008+ FEH's yet? My understanding is the harness that plugs into the battery is the hard part.

 

Here is the "map" to customize this request. A thin electrical wire (I believe an 18 gauge wire exists?) runs from the hybrid battery, along the drivers side floor board, thru the firewall (there is a gasket above and to the left of the brake pedal this wire can be run thru) to the AC/DC converter. From this converter it runs to the option 41H engine block heater charger (5m6z-10B689-AA) that is located under the engine block windshield fluid cap opening on the passenger side firewall. Rick, you need to check to see if your 2009 has the same charger. I'm clueless on how the wiring on the AC/DC converter is connected.

 

Thanks Billy.

Here is my battery:



You indicated some time ago that you knew someone who was attempting this hack. It appears to me they dropped this feature to save $6 or there was a battery life issue associated with it's use. Since the HV connector is still there I can only assume I would need the PS, compatible connectors, some wire and some time.

In the winter, I can get EV mode only after driving out of town, since I don't have a heated garage and the battery temp drops too low.

Guess I should see what my '09 manual shows.

(PS. I sent Paul a message.)

 

Dear Rick,

Your message and pictures above prompted me to return to the three shop manuals I have for my 2008 FWD FEH and to look where I had not before, namely, the "Wiring Diagrams" book. Using the hint found in third drawing above that the connector I need actually had the number C4227B, I tracked the connector down to page 150-93, where not only is the connector function confirmed but also the wiring pin-out is given. Now that I know the number of the connector, I will try to order it from my Ford dealer. And since I now know the wiring pin-out, I can buy the optional transformer 5M6Z-10B689-AA (or the equivalent for the 2008 FEH that I will try to find in my manuals), put together a small project box with a switch, fuse, pilot light, the transformer, suitably beefy low-voltage wiring and a 120 VAC cord with isolated ground, then try it out. Given the wiring of this circuit, the thermostatic control of the internal battery heater should be internal to the battery assembly itself.

In principle, I should be able to plug it into my block heater timer along with the block heater power cord in my garage. When I unplug my block heater in the morning before leaving for work, I will also unplug the battery heater cord and store it in the cargo area next to the project box.

But first I must get that connector from Ford. When I do, I'll report back to the list. Who knows? Ford may claim they no longer have that connector, even though it has the same number as the 2005 part above. I will then buy the transformer. When I have both in hand, I'll build the system, test it out in cold weather and report back on what hopefully will be a successful end to this story -- all of which could have been avoided, had Ford not decided to save $6 and take this connector and its wiring out of the 14405 low-voltage cable bundle.

Thanks to BillyK and Rick for their assistance in finding the connector and transformer order numbers.

Paul

 

The engine block heater option 41H for hte 2005-07 and very early 08 models utilized one 12ACV cord that you plugged into the electrical outlet. There is no seperate switch. The charger (5m6z-10B689) has dual "prongs" for electrical wires-one to the hybrid battery heater and one to the engine block plug. If one searches deep enough, GPSman1 has posted the hybrid battery heater only pulls something like 75 watts. Thus the wire to this location does not need to be "beefy".

 

Hi Paul, glad you got it figured out. No thanks needed for me, all I did was stir the pot, while you and Billy did all the work. (Thanks guys.)

Can we talk you into getting some pictures so this can be documented? I'd like to see the procedure get stickied.

 

Battery heater runs on 24v 3A so ~ 75 watts.

 

Hi Paul.

I don't see page 150-93 (or anything between 100-04-21 and 412) in my 2009 manual. Not much to look at when they drop a feature I guess.

 

Part C4227B is what is missing. What does the dealer charge for this part?

 

So Paul says C4227B is a connector and your page calls it a traction battery control module?