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Car has sat on battery conditioner for over a month and now won't start? Both batteries are fine (won't start from either)
Found I can start the vehicle if I inject power to fuse 54 and keep it live, but also noticed that, that whole bank of fuses 52-57 iirc? Have no voltage with ignition on? Is there a relay or another feeder fuse down the line that would cause this power loss?
Thanks in advance for your advice and time. 🍻
Last edited by Tuscan GT; Feb 27, 2025 at 08:43 AM.
Reason: Extra details.
No Afraid not, have made a jumper cable to transfer power from a spair 12V ignition live to fuse 54, but haven't traced why there is no power there as there should be normaly?
As to your issue, your thoughts of another power source feeding the fuses/slots 52 to 57 in the drivers facia fuse box would be correct, I will post pictures and diagrams showing the purple with black stripe wire that feeds 52 to 57, although, it says 57 is not used, yet, I have a fuse in slot 57, as do others that have posted a picture of their fuse box, just wanted to note that.
EDIT: F57 is in use for vehicles from VIN 26642 forward, F57 is for the transmission control module, gear change switch, and the park solenoid lock switch.
End Edit.
I will also show the heavy black cable that feeds the top row and some others of the fuse box, I only show this to confirm that this heavy black cable that is secured to a stud by nut, is not the only power source coming into the fuse box, so it is not like it feeds the whole panel, as other individual cables come into certain parts or the fuse box, just as the purple/black feeds 52-57, others feed other fuses.
First, I ask that you check all fuses, in all areas, as certain fuses control certain actions or functions of items that must work in an order of operations.
I would start in the boot on the left house battery fuse panel, first check 30 amp fuse F36, also check both battery management relays 295 and 297 as shown.
As can be seen in the diagrams, power feeds from the batteries to certain fuses, so above the house battery, check the 80 amp fuse F4 also, then on the right side mounted on top of the starter battery, check the flat blade fuses F4 aka C00913 (80 amp), and F5 aka C00914 (110 amp), as these feed power to the battery management relays and pin 1 of same.
Then check all fuses in the driver's side facia fuse box.
Please let me know if you had any immobilizer warning in the dash display, as the KESSY module is what triggers the Engine Management Ignition Supply Relay, as seen from the diagram.
Drivers facia fuse box.
My old drivers facia fuse box showing main lug, and purple with black stripe wire feeding fuses 52 - 57 slots.
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House battery fuse panel and associated diagrams for fuses F3 and F36, along with battery management relays 295 and 297 as shown.
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Starter battery mounted fuses to check.
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Finally, the Ignition Relay is located in the front under the carpet next to the front body control module box, listed as C00716.
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Wishing you luck in finding the solution.
Johnny
Last edited by Johnny Hotspur GT; Mar 16, 2025 at 02:19 PM.
Reason: Correction of F57 information
Thank you for taking the time to give such a detailed reply 🙏🏻
All boot and drivers side compartment fusses were checked prior to posting, but will go thru all of the above over the next few days (time permitting) in the order given and let you know, (I wasn't aware of the relay under pas side carpet...
Re: kessy
No error given, key recognised on approaching the vehicle for door/boot release, however key needs to be in ignition to start as push button gives (park/neutral) warning! Even though vehicle is in park?
@Tuscan GT ,
As to the park/neutral warning, it is odd that the key in the ignition switch would start the engine, I would think it would not start by either key or push button, but, let me ask, how is your shifter dust cover, is it in one piece, does it move smoothly from P to S, as it has the two magnets to show gear selection.
I should add a slight correction, the ignition relay is under the carpet, but it is inside the box that houses the front body control module and other relays.
I will also do an edit to my above information in prior post, as I showed in my 2005 drivers facia fuse box pictures, F57 does have a fuse in place, as does my 2006 wiring harness, although the pdf manual that has been shared here shows "not in use", so I went to IETIS and it shows that prior to VIN 26642 F57 is not used, but from VIN 26642 F57 is in use for the TCM, transmission control module, and powers the gear change switch, along with the park solenoid lock switch.
Edit to add info, and F57 diagrams.
Johnny
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Diagram showing F57 for TCM in use.
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Last edited by Johnny Hotspur GT; Mar 16, 2025 at 02:12 PM.
Hello @sazam ,
If I understand your question correctly, they yes, some banks of fuses share one power supply, it is not one power wire in and out for every fuse in the vehicle, you can see as I pictured fuses 52-57 in the facia fuse box, the purple with black stripe wire feeds those fuses, just as the large black wire from the house battery mega fuse feed the top row of the facia fuse box, you can see the rusty nut on the lug feeding the silver/gray bus-bar, I highlighted it with purple dots.
Sorry about the condition of the fuse box for pictures, it's one for the scrapyard, but I kept it for purposes.
Morning Johnny
The outcome was after nearly 30 years in my current employment I was given my 12 weeks notice and to keep any chance of severance had to take that work away without the GT. Back home now but this has rather taken a back seat as after 8 years of owning her
once fixed will probably be for sale.
Will update once I pick this up again as I hate dead threads that help no one else 👍🏼
Thanks again for sharing your time and experience, it is very much appreciated 🙏🏻
