Davegoorn Posted February 3 Share Posted February 3 Hi fellow Audi people Could some one point me in the direction of the reversing light switch location on an Audi A3 1.4 tfsi 3 door i think it may be at fault as I’ve changed the bulb carrier because the light unit had let in water so it was soaking wet amzingly all the bulbs worked except the reversing bulb (i have now resealed the light unit with Bison glue) all other bulbs work fine but when I select reverse a loud beeb and warning on the DIS comes up If someone has a part number for the switch that would be brilliant or any other idea what it may be thanks all Quote Link to comment Share on other sites More sharing options...
cliffcoggin Posted February 3 Share Posted February 3 I can't help with the switch location, but I suggest that if the reversing beep works then the switch must be working. I can't imagine there are separate switches for the light and the sounder. Quote Link to comment Share on other sites More sharing options...
Magnet Posted February 3 Share Posted February 3 Welcome David, Cliff raises a good point, so let’s have some clarification - do your reversing sensors work? If so the switch should be serviceable. Perhaps you could let us know before we move on to more complex checks. Kind regards, Gareth. Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 7 Author Share Posted February 7 Hi Cliff and Gareth thanks for your replies My reversing sensors work fine If it’s not the switch then I guess it will be the wiring do you happen to know the colour of the wire that feeds the reversing light Thx again Quote Link to comment Share on other sites More sharing options...
cliffcoggin Posted February 7 Share Posted February 7 David. It might be damaged wiring, but it's more likely to be corroded contacts in the bolb holder or a bad earth. Am I right in assuming you fitted a new bolb? You did not specifically mention it so I have to ask. Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 7 Author Share Posted February 7 Hi Cliff Yes I replaced the bulb and the bulb holder was a brand new genuine Audi part so unlikely to be rust/corrosion I’d have thought Do you know where I’d find the Earth for this Cliff Thx again Quote Link to comment Share on other sites More sharing options...
cliffcoggin Posted February 7 Share Posted February 7 Sorry, I don't know. Perhaps examination of the light unit on the other side will give a clue. Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 7 Author Share Posted February 7 Hi Guys i now have a VCD printout of the error : 7 Faults Found: 01134 - Alarm Horn (H12) 000 - - Freeze Frame: Fault Status: 01100000 Fault Priority: 4 Fault Frequency: 3 Reset counter: 95 Mileage: 168728 km Time Indication: 0 Date: 2023.11.27 Time: 12:00:37 Freeze Frame: Term 15 Off Voltage: 12.15 V OFF ON Term 50 Off OFF OFF 01518 - Bulb for Back-Up Lights; Left (M16) 010 - Open or Short to Plus - Intermittent Freeze Frame: Fault Status: 00101010 Fault Priority: 2 Fault Frequency: 159 Reset counter: 137 Mileage: 168799 km Time Indication: 0 Date: 2023.12.12 Time: 08:31:17 Freeze Frame: Term 15 On Voltage: 14.75 V ON ON Term 50 On OFF ON 00987 - Lamp for Brake Light; Left (M9) 010 - Open or Short to Plus - Intermittent Freeze Frame: Fault Status: 00101010 Fault Priority: 1 Fault Frequency: 2 Reset counter: 121 Mileage: 168800 km Time Indication: 0 Date: 2023.12.12 Time: 11:03:10 Freeze Frame: Term 15 On Voltage: 14.85 V ON ON Term 50 On OFF ON 01501 - Bulb for Blinkers; Rear Left (M6) 010 - Open or Short to Plus - Intermittent Freeze Frame: Fault Status: 00101010 Fault Priority: 2 Fault Frequency: 2 Reset counter: 121 Mileage: 168801 km Time Indication: 0 Date: 2023.12.12 Time: 11:05:26 Freeze Frame: Term 15 On Voltage: 14.95 V ON ON Term 50 On OFF OFF 00532 - Supply Voltage B+ 001 - Upper Limit Exceeded - Intermittent Freeze Frame: Fault Status: 00100001 Fault Priority: 4 Fault Frequency: 1 Reset counter: 121 Mileage: 168813 km Time Indication: 0 Date: 2023.12.13 Time: 11:17:26 Freeze Frame: Term 15 On Voltage: 15.50 V ON ON Term 50 On OFF OFF 01134 - Alarm Horn (H12) 004 - No Signal/Communication - Intermittent Freeze Frame: Fault Status: 00100100 Fault Priority: 4 Fault Frequency: 4 Reset counter: 130 Mileage: 168995 km Time Indication: 0 Date: 2024.01.18 Time: 09:07:15 Freeze Frame: Term 15 Off Voltage: 11.25 V OFF ON Term 50 Off OFF OFF 00897 - Windshield Washer Pump (V5) 012 - Electrical Fault in Circuit - Intermittent Freeze Frame: Fault Status: 00101100 Fault Priority: 3 Fault Frequency: 1 Reset counter: 131 Mileage: 169002 km Time Indication: 0 Date: 2024.01.18 Time: 09:46:36 Freeze Frame: Term 15 On Voltage: 14.75 V ON ON Term 50 On OFF OFF weird its showing errors in all the bulbs as only the reverse light doesnt work also the washer pump works perfectly the alarm I know isn’t working hope this helps thx guys Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 7 Author Share Posted February 7 Hi Jason i will check the connector as the bulb carrier is brand new i have no idea where the negative earth is unfortunately is it one of the wires that goes into the connector (plug) thanks Jason Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 8 Author Share Posted February 8 Hi Jason thanks for the info i think i will change the connector/plug after ive checked the switch (although im still not sure where to look for the switch) as i saw a YouTube video with a similar issue to mine the new plug seems to sort his issue out thx again Jason Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 8 Author Share Posted February 8 Hi Jason Just by a process of elimination to make sure the reversing switch is working all other bulbs in the real light cluster work other than the reversing light (i know the VCD printout says all the other bulbs have a intermittent fault but they have all worked since I had the car from November 2023) I dont like getting beaten hence why I'm determined to sort this fault out Many thanks again Jason Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 8 Author Share Posted February 8 Hi Jason First of all i really appreciate your help on this In answer to your question i have checked the fuse same fuse controls the a/c and something else so i know thats fine i will try the battery earth cleaning/ spraying i have soldered stuff before but prefer to leave it as a last resort but from what you've said changing the plug is the way to solve this once and for all This isn't going to beat me smiles Quote Link to comment Share on other sites More sharing options...
cliffcoggin Posted February 8 Share Posted February 8 (edited) David. I am going to leave this matter in Jason's hands as he knows far more than me, but I will add two comments. I don't believe the statement that the reversing lights are on the same fuse as the aircon and something else. The whole idea of having multiple fuses is to ensure each circuit is independant of the others, so that failure of one does not affect other circuits. What is your source for this information? I am not a fan of computer diagnoses without careful interpretation, however yours shows two instances of short circuits at the bolbs which suggests to me that the wiring is damaged or there is still water present somewhere in the light unit. Edited February 9 by cliffcoggin Incomplete. 1 Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 8 Author Share Posted February 8 Hi Jason With my car being a 3 door A3 there is only one reversing light on the passenger side and 1 fog light on the rear drivers side the fog light works its only the reversing light that doesn’t work i will check the fuse you suggest I'm not sure where i got that info about the fuse sharing with a/c i must have read it some where i was only going to remove the reversing switch to check the wiring and see if it was working thanks again Jason Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 8 Author Share Posted February 8 20 minutes ago, cliffcoggin said: David. I am going to leave this matter in Jason's hands as he knows far than me, but I will add two comments. I don't believe the statement that the reversing lights are on the same fuse as the aircon and something else. The whole idea of having multiple fuses is to ensure each circuit is independant of the others, so that failure of one does not affect other circuits. What is your source for this information? I am not a fan of computer diagnoses without careful interpretation, however yours shows two instances of short circuits at the bolbs which suggests to me that the wiring is damaged or there is still water present somewhere in the light unit. Hi Cliff Thanks so much for your help Quote Link to comment Share on other sites More sharing options...
Magnet Posted February 8 Share Posted February 8 There seems to have been an excess of dialogue on this issue, and I can add only two more points - hopefully not with too much detail:- If your reverse bleeper are working then it’s reasonable to believe your reverse switch is operating - as Cliff said from the outset. Have you checked the wiring within the flexible harness section twixt body and tailgate? This is a favourable place for wires to fracture - particularly in cold conditions. Oops, sorry another question- have you checked for voltages and continuity at the bulb holder? Personally, I would now consider engaging an hour’s services with an auto electrician if I was in your situation. Anyway…. Kind regards, Gareth. Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 8 Author Share Posted February 8 Hi Jason Engine is 1.4 TFSI manual six speed Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 8 Author Share Posted February 8 27 minutes ago, Magnet said: There seems to have been an excess of dialogue on this issue, and I can add only two more points - hopefully not with too much detail:- If your reverse bleeper are working then it’s reasonable to believe your reverse switch is operating - as Cliff said from the outset. Have you checked the wiring within the flexible harness section twixt body and tailgate? This is a favourable place for wires to fracture - particularly in cold conditions. Oops, sorry another question- have you checked for voltages and continuity at the bulb holder? Personally, I would now consider engaging an hour’s services with an auto electrician if I was in your situation. Anyway…. Kind regards, Gareth. Hi Gareth Thanks for your info on checking the wires ill do that when it finally stops raining! Dave Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 9 Author Share Posted February 9 Hi Jason Well I've looked for the fuse for the reversing light switch as per your message “Tech bits .. the central controller is responsible for reverse lights code 09-Cent-Elect .. but that's a whole new chapter CHECK F4 FUSE which is a 5Amp fuse in passenger side CHECK the wires in the plug terminal on the Reversing Switch” im really confused now as there is no fuse box on the passenger side (i removed the plastic trim to look) its on the drivers side i cant find any fuse that covers the reversing light anywhere including the fuse box inside of the engine compartment i will go ahead and change the plug once the weather improves again thanks for your help Jason Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 9 Author Share Posted February 9 Hi Jason Ill have a look tomorrow thanks for the info Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 10 Author Share Posted February 10 Hi Jason ive checked fuse F4 which is all good drivers side opened the fuse box in the engine there is no fuse in F5 or F7 (see pic) it looks like i have the 30 fuse version in the engine compartment i also checked the wiring in the black gator on the boot there appears to be no damage to any of the wires within the gator cheers Jason Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 10 Author Share Posted February 10 Hi Jason I’m pretty sure this is the reversing switch all looks good inside no noticeable damage or anything once id removed the plug Im at a complete loss now i dont have an multimeter unfortunately Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted February 10 Author Share Posted February 10 I’m a little confused as to there being no fuses in the engine compartment fuse box that you told me to check Quote Link to comment Share on other sites More sharing options...
Davegoorn Posted April 11 Author Share Posted April 11 Hi again All a little update I’ve finally bit the bullet and rewired the rear lights with a new plug which came with about 15mm of wire and guess what I still have no Reversing light same error comes up on the Dash “left rear reversing light not working” (with a picture of a bulb with a line through it) all the other lights in that cluster work brakes, indicator, lights so im at a complete loss now anybody go any suggestions ? heres a printout from VCD 01518 - Bulb for Back-Up Lights; Left (M16) 010 - Open or Short to Plus - Intermittent Freeze Frame: Fault Status: 00101010 Fault Priority: 2 Fault Frequency: 254 Reset counter: 190 Mileage: 168799 km Time Indication: 0 Date: 2023.12.12 Time: 08:31:17 Freeze Frame: Term 15 On Voltage: 14.75 V ON ON Term 50 On OFF ON 00153 - Windshield Wiper Motor; Driver Side (V216) 004 - No Signal/Communication - Intermittent Freeze Frame: Fault Status: 00100100 Fault Priority: 2 Fault Frequency: 1 Reset counter: 164 Mileage: 169434 km Time Indication: 0 Date: 2024.03.18 Time: 13:42:33 Freeze Frame: Term 15 On Voltage: 14.65 V ON ON Term 50 On OFF OFF 00927 - Terminal 30 (Right) 011 - Open Circuit - Intermittent Freeze Frame: Fault Status: 00101011 Fault Priority: 1 Fault Frequency: 1 Reset counter: 164 Mileage: 169434 km Time Indication: 0 Date: 2024.03.18 Time: 13:42:49 Freeze Frame: Term 15 On Voltage: 14.65 V ON ON Term 50 On OFF OFF 00532 - Supply Voltage B+ 001 - Upper Limit Exceeded - Intermittent Freeze Frame: Fault Status: 00100001 Fault Priority: 4 Fault Frequency: 5 Reset counter: 164 Mileage: 168813 km Time Indication: 0 Date: 2023.12.13 Time: 11:17:26 Freeze Frame: Term 15 On Voltage: 15.50 V ON ON Term 50 On OFF OFF thanks again all Quote Link to comment Share on other sites More sharing options...
Magnet Posted April 11 Share Posted April 11 Hello David, This has been going on for some time, and without reading back over all the posts:- Have you checked the flexible harness section twixt tailgate and body - looking for fractured wires? Have you now got yourself a multi-meter? Kind regards, Gareth. Quote Link to comment Share on other sites More sharing options...
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