A strange turn indicator problem

tayanc · 6th November 2021, 14:53

(Please pardon me if I use any incorrect terms for specific parts or functions, I'm neither car-savvy nor knowledgeable in English auto terminology)

The car involved is a Rover 75 2.0 V6 of year 2000. I bought it a little while ago, and normally I keep the headlights on during the day while I drive, so I did not notice the issue for a while. As expected, when the headlight switch is turned on; all turning indicators work normally.

But when the light switch is turned back to 0, things take a strange turn: When a left turn signal is issued, only the front left turn signal flashes; the side turn signal and rear turn signal stay off. When a right turn signal is issued; the front right turn signal does not light up, but the side and rear ones do work.

Currently, the car is in my hometown, which is a small border town that has no willing mechanics to tangle things even further. When the car comes to Istanbul, as Rover was never an affordable car brand in Turkey, there is a limited number (i.e. 4) of Rover mechanics, who may or may not be able to sort out the issue, and help will be much appreciated.

So, please allow this be my first post among many to come, as I am quite positive that my lovely car will soon turn out to be a complete ripoff with many rabbit holes to go through. Still, I like it. It's very posh and makes me look special on the road

Devilish · 6th November 2021, 16:20

If you are going to tackle this yourself, you need to get hold of a LSM (Light Switch module), any one will do to diagnose if the fault is within the module itself.
The module is far more than just a lighting switch, you do not need to be blinded with what is not important right now.

Borrow or buy one, it does not matter if yours or the one you get has a fog light switch or not, do not pay a lot of money, because vehicle use is recorded and stored in the module, it may concern you if it displays different mileage etc, to your cars history, or it may be so close you may not be too bothered.

Once you have tried another module, if your indicators work, you can go from there.

If you have no option but to obtain one outside turkey, I deal with people there often, contact me though PM, I can send you one.

Yorkshire GOC · 6th November 2021, 16:26

Have a look at this link from 2018 -could be water damage to the LSM or possibly a failing battery/alternator.

https://www.the75andztclub.co.uk/for...d.php?t=281040

planenut · 6th November 2021, 17:06

Welcome to the Club Tayanc, great choice of car. Your use of the terminology is very good.

I don't think you need go search for a Rover mechanic, rather someone with knowledge of vehicle electrics. Good luck.

tayanc · 10th November 2021, 12:43

Quote:

Originally Posted by Devilish

If you are going to tackle this yourself, you need to get hold of a LSM (Light Switch module), any one will do to diagnose if the fault is within the module itself.
The module is far more than just a lighting switch, you do not need to be blinded with what is not important right now.

Borrow or buy one, it does not matter if yours or the one you get has a fog light switch or not, do not pay a lot of money, because vehicle use is recorded and stored in the module, it may concern you if it displays different mileage etc, to your cars history, or it may be so close you may not be too bothered.

Once you have tried another module, if your indicators work, you can go from there.

If you have no option but to obtain one outside turkey, I deal with people there often, contact me though PM, I can send you one.

Quote:

Originally Posted by Yorkshire GOC

Have a look at this link from 2018 -could be water damage to the LSM or possibly a failing battery/alternator.

https://www.the75andztclub.co.uk/for...d.php?t=281040

Quote:

Originally Posted by planenut

Welcome to the Club Tayanc, great choice of car. Your use of the terminology is very good.

I don't think you need go search for a Rover mechanic, rather someone with knowledge of vehicle electrics. Good luck.

Countless thanks to all those who replied. I will be dealing with the issue once I can make an appointment with a known repair shop.

SD1too · 10th November 2021, 15:18

Quote:

Originally Posted by tayanc

It's very posh and makes me look special on the road

That's very good Tayanç.

Simon

trikey · 10th November 2021, 18:46

Have a chat on Facebook with these guys…

tayanc · 19th September 2022, 22:38

I'm sorry for my late reply. I am, and already have been in contact with the Rover communities in Turkey, but we are spread far off... both in terms of geography and also in terms of models. There are not too many 75 owners, but a considerable amount of Honda-era Rover owners who take heartwarming pride in their cars. However, recently I have been able to join a group of 75 owners; who have been very helpful.

However, I was unable to contact them when I needed this fix. I got a new LSM from Bulgaria, which also happened to show the same exact fault; but luckily I found an auto electronics mechanic who had the exact same main IC that was for some reason taken out of an Audi A3 LSM if memory serves, and right after that my LSM came back to life, eventually to hint me at a number of broken bulbs; which have been serving gladly after replacement.

After all this, an unexpected summer rain threw my car into a bad left indication spree that lasted for a day and resolved on its own, after which I thought I am being too late to change my sunroof drains; as there are not too many LSMs or chips that are available for being shorted due to water damage.

At this stage, my lighting works flawlessly on a repaired LSM.

hogweed · 20th September 2022, 15:48

One thing you should get (it's free to download) is TOAF, which is excellent for diagnosing faults on your Rover, including the airbag etc.

6th November 2021, 14:53	#1
tayanc Newbie Rover 75 Saloon Join Date: Oct 2021 Location: Istanbul Posts: 14 Thanks: 0 Thanked 2 Times in 1 Post	A strange turn indicator problem (Please pardon me if I use any incorrect terms for specific parts or functions, I'm neither car-savvy nor knowledgeable in English auto terminology) The car involved is a Rover 75 2.0 V6 of year 2000. I bought it a little while ago, and normally I keep the headlights on during the day while I drive, so I did not notice the issue for a while. As expected, when the headlight switch is turned on; all turning indicators work normally. But when the light switch is turned back to 0, things take a strange turn: When a left turn signal is issued, only the front left turn signal flashes; the side turn signal and rear turn signal stay off. When a right turn signal is issued; the front right turn signal does not light up, but the side and rear ones do work. Currently, the car is in my hometown, which is a small border town that has no willing mechanics to tangle things even further. When the car comes to Istanbul, as Rover was never an affordable car brand in Turkey, there is a limited number (i.e. 4) of Rover mechanics, who may or may not be able to sort out the issue, and help will be much appreciated. So, please allow this be my first post among many to come, as I am quite positive that my lovely car will soon turn out to be a complete ripoff with many rabbit holes to go through. Still, I like it. It's very posh and makes me look special on the road Last edited by tayanc; 6th November 2021 at 18:01.. Reason: Grammar

6th November 2021, 16:20	#2
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,125 Thanks: 3 Thanked 189 Times in 121 Posts	If you are going to tackle this yourself, you need to get hold of a LSM (Light Switch module), any one will do to diagnose if the fault is within the module itself. The module is far more than just a lighting switch, you do not need to be blinded with what is not important right now. Borrow or buy one, it does not matter if yours or the one you get has a fog light switch or not, do not pay a lot of money, because vehicle use is recorded and stored in the module, it may concern you if it displays different mileage etc, to your cars history, or it may be so close you may not be too bothered. Once you have tried another module, if your indicators work, you can go from there. If you have no option but to obtain one outside turkey, I deal with people there often, contact me though PM, I can send you one. __________________ If at first you don't succeed, hide the evidence

6th November 2021, 16:26	#3
Yorkshire GOC I really should get out more....... Rover 75 connoisseur se v6 auto Join Date: May 2014 Location: Hull Posts: 2,063 Thanks: 1,842 Thanked 623 Times in 469 Posts	Have a look at this link from 2018 -could be water damage to the LSM or possibly a failing battery/alternator. https://www.the75andztclub.co.uk/for...d.php?t=281040 __________________ She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide.

10th November 2021, 18:46	#7
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,763 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Have a chat on Facebook with these guys… __________________ Lest we forget..

20th September 2022, 15:48	#9
hogweed I really should get out more....... Vauxhall Insignia CDTi; MG TF 135 Join Date: Jan 2010 Location: Norn Iron Posts: 2,958 Thanks: 942 Thanked 378 Times in 297 Posts	One thing you should get (it's free to download) is TOAF, which is excellent for diagnosing faults on your Rover, including the airbag etc. __________________ Past cars: MGB GT; Escort 1300 Sport; Vauxhall VX4/90; Marina Coupe TC; Celica ST (1972); Montego Turbo; Astra GTE 16V; Astra GSI 16V; Golf GTI 16V (Mk II); Sierra XR4x4 Estate; BMW 325i (E30); BMW M3 3.0; BMW M3 3.2 Evo. Left some of the more embarrassing ones out. And about 30 motorbikes.

6th November 2021, 17:06	#4
planenut Regional Secretary Rover 1.8T Tourer Join Date: May 2007 Location: Heathrow Posts: 6,948 Thanks: 1,551 Thanked 2,036 Times in 1,264 Posts	Welcome to the Club Tayanc, great choice of car. Your use of the terminology is very good. I don't think you need go search for a Rover mechanic, rather someone with knowledge of vehicle electrics. Good luck.

19th September 2022, 22:38	#8
tayanc Newbie Rover 75 Saloon Join Date: Oct 2021 Location: Istanbul Posts: 14 Thanks: 0 Thanked 2 Times in 1 Post	I'm sorry for my late reply. I am, and already have been in contact with the Rover communities in Turkey, but we are spread far off... both in terms of geography and also in terms of models. There are not too many 75 owners, but a considerable amount of Honda-era Rover owners who take heartwarming pride in their cars. However, recently I have been able to join a group of 75 owners; who have been very helpful. However, I was unable to contact them when I needed this fix. I got a new LSM from Bulgaria, which also happened to show the same exact fault; but luckily I found an auto electronics mechanic who had the exact same main IC that was for some reason taken out of an Audi A3 LSM if memory serves, and right after that my LSM came back to life, eventually to hint me at a number of broken bulbs; which have been serving gladly after replacement. After all this, an unexpected summer rain threw my car into a bad left indication spree that lasted for a day and resolved on its own, after which I thought I am being too late to change my sunroof drains; as there are not too many LSMs or chips that are available for being shorted due to water damage. At this stage, my lighting works flawlessly on a repaired LSM.