#11
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If it's the same fault I had (or similar) you can remove and short-circuit the relay to start the car, it's quick and easy to test that.
I ran mine like that, with just a wire instead of the relay, for 2 and a half years until I could get it fixed as part of an MJ overhaul. (Admittedly mostly during Covid times so it got very little use)
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant. 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one! Finally: gone, but not forgotten..... 1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later) 1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! |
#12
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Quote:
Have you checked battery voltage at rest and while trying to crank and also voltage by the starter?
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
#13
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You are right.
Working alone yesterday so not able to check at starter. The battery is new (three mths old), and sits on a Ctech so have assumed it is fine. Will check that...goodness!.. Have we a part number for the F125 and suggested supplier? I think I should get all bits and bobs and when I get another pair of hands at the weekend we can get to the solution...somehow.. I Also need to sort that jumper idea so that I can fault find better.. Many thanks... |
#14
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Part number for the F125 switch is 01L919821B, assuming yours is from '99 or newer. It's a 10-pin connector. Supplier wise, depends on what you want. For OEM, the following site has them listed at 328 Euro.
https://originalteilemarkt.de/multif...19821b-2807334 You can go further East (if you know what I mean) and get them a lot cheaper, which I did. BTW Updating your signature line with details of the car will help in circumstances like this, where there are variations in parts depending on year.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#15
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Quote:
https://www.ht-onlineshop.de/vag/ant...f_128007_29039
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Dean Future work on "Red Dwarf": Fridge, solar sunroof, radio-controlled clock, interior and exterior dimming mirrors, Alcantara headlining/pillars/rear shelf, rear US outer lights, passenger memory seat, rear electric (lumbar and headrest) heated seats, Servotronic. __________________ Current: 2002 A8 D2 S8 FE - "Red Dwarf" - Misano Red - Platinum/Silver Interior, PDC, Sat Nav Plus with BOSE and hidden Dension Bluetooth, Multi-changer, Heated Front Seats, Bi-Xenons, FE Wheels, Phone Prep with Nokia 6210, Detachable Towbar, Rear Blinds, S8 plate but no other optional extras 1st Place Winner - A8Parts Annual UK Meet 2018 1st Place Winner - A8-Freunde Annual German Meet 2018 2nd Place Winner - A8-Freunde Annual German Meet 2019 2002 A8L D2 with a factory fitted S8 engine and drivetrain - "Evergreen" - Irish Green Pearl (TBC) - magnolia leather seats with magnolia door cards/door trims, magnolia leather head-lining, extended leather pack 3 (dark green leather dash, upper door cards, steering wheel, lower dash, centre tunnel and rear parcel shelf), factory black external trim (in lieu of chrome), self-levelling suspension, Servotronic, Brembo brakes, "gullideckel" / "man-hole cover" / "pie-plate" 8Jx18 polished 10-hole design wheels typically seen on the W12, Park Distance Control, heated windscreen, multifunction steering wheel, Vavona burl (burr-walnut) wood inserts with cream/magnolia door switch trims, phone preparation to the front with Nokia 6091 phone, phone preparation to the rear with Nokia 6091 phone on the central rear console, third phone preparation in the rear centre console, rear blinds, rear headrest release feature, rear electric heated seats with lumbar and recline function (the rear passenger seat has the facility to move the front passenger seat forward), BOSE audio, Rear Screen Entertainment (RSE) with dual factory fitted Alpine screens, integrated DVD player (under the centre of the rear bench with 4 DVD storage slots) and two remote controls (the controls and inputs for the RSE are in the rear centre console and the screens can operate independently of each other,) factory supplied leather headrest covers to hide the rear screens, rear vanity mirrors (standard A8L), dark green rear wedge footrests with cream piping, front passenger memory seat, dark green floor carpeting and mats – piped in cream, rear slumber pillows for the headrests, integrated fridge with integrated tumblers inside the rear centre headrest bar compartment, solar roof, auto-dimming interior and exterior mirrors, factory driver’s seat fire extinguisher, tire pressure monitoring system, first aid kit, 12 V socket in the boot, TRACKER, derestricted – top speed is 155mph plus 2007 A6 Allroad C6 3.0TDI Quattro - Highland Green (Audi Exclusive Colour) - Cream leather interior with Wood, Advanced MMI, Keyless, Bose, Advanced PDC, Sunroof, Heated Memory Seats, Adaptive Xenons, Adaptive Air Suspension, Servotronic Previous (went to good homes): 2002 A8 D2 2.8 Quattro Sport - "Big Red" - Tornado Red (Special Order) - Twist Interior, PDC, Passenger Memory Seats, Symphony II with BOSE, Heated Front Seats, Bi-Xenons, Auto-dimming Mirrors, 20" FE Wheels, Servotronic Steering 2002 A8 D2 2.8 Quattro Sport - Aqua Blue Pearl - Twist Interior, PDC, Sat Nav Plus with BOSE, Multi-changer, Heated Front Seats, Bi-Xenons, Auto-dimming Mirrors, Avus Wheels |
#16
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when testing voltages measure the voltage at the box on the chassis leg and earth on the body. Then measure voltage on the chassis leg and the engine. Then check the resistance from the chassis to the engine. Could be a bad engine earthing lead.
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Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light. |
#17
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thanks all.
I am suspecting maybe a poor earth. checked the battery and battery earth this evening...like new... with extra pair of hands on sunday I can do better checks... Am I correct that if I can see on vcds the gear selector changing and in P then it will not be the F125 switch? Actually, it is just like the starter has jammed.. ?? |
#18
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Quote:
There are multiple separate circuits in the F125, the Gearbox ECU uses a completely separate set of physical tracks/contacts to the starter relay. The contacts relevant to the starter relay are NOT monitored in any way by VCDS, they're purely "old school" wiring. The five arcs bottom/left are the ECU information tracks, the four at the top are for starter (9/10) and reversing lights (7/8). (Numbers relate to the 10-pin plug, 6 is unused)
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant. 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one! Finally: gone, but not forgotten..... 1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later) 1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! Last edited by HPsauce; 22nd May 2023 at 09:14 PM. |
#19
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Quote:
__________________
2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#20
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Great.
So if I do the bypass and the vehicle starts, then it is the F125 switch. correct? Assuming I have done the other checks.. Many thanks again. |
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