[lemedico]

congratulations on your upgrades!

pardon my non-engineering brain, but you've made the wiring bit seem TOO easy. Especially the fact that you've hooked up a Honda product to a Maruti Suzuki.

The thread by Leoshashi has an extensive description regarding his wiring dilemmas, that too when using a part manufactured by Maruti itself. He needed to replace the entire roof wiring harness.

Could you be a bit more descriptive on how exactly did you wire this up? I have a Ciaz delta 2021, and I too wish to upgrade to the auto-dimming IRVM. Alas, cannot source the wiring harness off Boodmo or MSIL directly. If your method works, that's what I am doing- using a Honda part instead of a Maruti part, also saving a few thousand rupees on the part procurement alone!

[Leoshashi]

Originally Posted by lemedico

The thread by Leoshashi has an extensive description regarding his wiring dilemmas, that too when using a part manufactured by Maruti itself. He needed to replace the entire roof wiring harness.

Lol
No man. I just got a roof harness from another car so that I can use it's coupler end at the mirror while other end connections have been made to the fuse box. I hadn't replaced any harness.

[lemedico]

Originally Posted by Leoshashi

Lol
No man. I just got a roof harness from another car so that I can use it's coupler end at the mirror while other end connections have been made to the fuse box. I hadn't replaced any harness.

Ah yes, it wasn't you, but a this fellow bhpian

https://www.team-bhp.com/forum/diy-d...ml#post4550726 (DIY: Auto-Dimming IRVM (S-Cross))

[chiranjitp]

Originally Posted by Tokengrip

Did a quick check on boodmo after going through your post and decided to take the plunge and see if I can make it work. At this price I can afford to take the risk. Thank you for the tip and the inspiration.

Thanks Tokengrip, glad you liked my DIY. Regarding Punto, that car also has a windshield mounted IRVM. So you only need to check the design of the IRVM mount, whether it's similar to the Honda mount or not.

Btw, we also had a Punto back in the day, lovely car. Nice to see someone holding onto a Punto even in 2021 .

Originally Posted by ManasN95

Thank you so much for this post! Being a Honda City owner myself this is quite the jackpot you unearthed for City owners.
Immediately placing an order for the same, although I am a bit of a novice regarding DIYs. I am guessing a competent garage can do the job for me?

Thanks ManasN95. Since your car is a Honda, there's no worry about the mount. Only thing that you would need to do is power the IRVM, any accessories store (or car electrician) should be able to do. However make sure they do the wiring properly. The +ve (red wire) needs a 12V supply, for that I tapped into the fuse box using a fuse tap. The -ve (black wire) is for ground, that can taken from any bolt.

Originally Posted by lemedico

congratulations on your upgrades!

pardon my non-engineering brain, but you've made the wiring bit seem TOO easy. Especially the fact that you've hooked up a Honda product to a Maruti Suzuki.

Could you be a bit more descriptive on how exactly did you wire this up? I have a Ciaz delta 2021, and I too wish to upgrade to the auto-dimming IRVM. Alas, cannot source the wiring harness off Boodmo or MSIL directly. If your method works, that's what I am doing- using a Honda part instead of a Maruti part, also saving a few thousand rupees on the part procurement alone!

Thanks lemedico. Glad you found my wiring easy to understand, lol . Basically the IRVM needs only this much to work, one +ve line (12V supply) & one -ve (ground/earth) line. So, what I did was take the +ve from the fuse box (via a fuse tap), then route that wire via the A pillar, roof liner, then finally into the IRVM. Regarding the -ve wire, I connected it to a bolt in the A pillar. This is the simplest way to do it. I (Shashi as well) did a trial run from the battery, connected the +ve wire (red) to the +ve terminal of the battery & -ve wire (black) to the -ve terminal of the battery.

The other way would be to use a wiring harness of the top variant (like in the case of a S-cross), which will have the coupler for the auto IRVM (of course the auto IRVM has to be of MSIL). With an installation like that, there's no need of doing wiring separately for the IRVM, use fuse tap etc. Also with an installation like that, there's no need to splice the connector of the IRVM. You can simply plug in, coupler to coupler. Whereas in my installation, I had to cut the stock Honda coupler (that came with the IRVM), then join my wire with the IRVM wire directly. Of course I soldered them properly & used a heat shrink over it.

Regarding what Shashi did for his XL6 (Shashi please correct me if I am wrong), was take an MSIL IRVM wiring harness so that he could have a coupler to coupler connection between the IRVM & the wiring harness. The other side of the wiring was done like mine, +ve from the fuse box & -ve from a bolt. Basically he got a wiring harness for the coupler. That way he can easily remove the IRVM (if he needs to), whereas in my case I would need to remove the whole wiring harness.

Hope you have got a better understanding of what we did here, the different ways of powering an auto IRVM.

[lemedico]

Originally Posted by chiranjitp

The other way would be to use a wiring harness of the top variant (like in the case of a S-cross), which will have the coupler for the auto IRVM (of course the auto IRVM has to be of MSIL). With an installation like that, there's no need of doing wiring separately for the IRVM, use fuse tap etc. Also with an installation like that, there's no need to splice the connector of the IRVM. You can simply plug in, coupler to coupler. Whereas in my installation, I had to cut the stock Honda coupler (that came with the IRVM), then join my wire with the IRVM wire directly. Of course I soldered them properly & used a heat shrink over it.

Thank you very much. I am ordering one now and going to get this done on my car the day it arrives. Quick question, the fuse tap goes into any fuse holder labelled 'blank', right? How many amperes of fuse(tap) do you recommend?

P.S., you've struck gold by discovering a stupidly cheap part from HONDA, that too from a TOP model ZX City (the 4th generation has this frameless + auto-dimming type). I have never seen anything from Honda which has a sticker price lower than similar parts from other badges.
Cheers!

[Aditya]

DIY: Installing an Auto-Dimming IRVM and Digital Clock & Temperature Display in my Maruti Swift - Posts moved to a new thread.

[KarDIY]

Originally Posted by chiranjitp

A tale of two DIYs

I have Few Questions:
1. Why 5 wires when only 2 are of use?
2. You got the mount from scrap but any suggestions from where we can get it?

[chiranjitp]

Originally Posted by KarDIY

I have Few Questions:
1. Why 5 wires when only 2 are of use?
2. You got the mount from scrap but any suggestions from where we can get it?

1. For the auto dimming to work (as in dim when light falls on it), only two wires are enough. One +ve wire (for 12V supply), one -ve wire (for ground/earth). Regarding the rest of the 3 wires, one of them will be for the reverse signal (I haven't figured out which one). In our Ecosport (with factory fitted auto IRVM), the auto dimming function is disabled when we engage reverse gear (to aid rear visibility), so I am certain one of the remaining wires is for this function. As for the rest 2 wires, I am guessing they are for reverse parking sensor/camera display.

2. From my research, the mount is not sold separately by any OEM. Only other option would be to buy the auto dimming MGA kit of Celerio, but that's priced at 6k. So, I guess scrapyard/FNGs would still be the most practical option. Good thing here is that Maruti mount is also same, so you should easily find one. Among Marutis, Baleno, Brezza, S-Cross etc come with a windshield mounted IRVM.

[KarDIY]

Originally Posted by chiranjitp

1. For the auto dimming to work (as in dim when light falls on it), only two wires are enough. One +ve wire (for 12V supply), one -ve wire (for ground/earth). Regarding the rest of the 3 wires, one of them will be for the reverse signal (I haven't figured out which one). In our Ecosport (with factory fitted auto IRVM), the auto dimming function is disabled when we engage reverse gear (to aid rear visibility), so I am certain one of the remaining wires is for this function. As for the rest 2 wires, I am guessing they are for reverse parking sensor/camera display.

2. From my research, the mount is not sold separately by any OEM. Only other option would be to buy the auto dimming MGA kit of Celerio, but that's priced at 6k. So, I guess scrapyard/FNGs would still be the most practical option. Good thing here is that Maruti mount is also same, so you should easily find one. Among Marutis, Baleno, Brezza, S-Cross etc come with a windshield mounted IRVM.

Thank you for answering,
Now I'm also ordering the Auto diming mirror.

My research also just that most the cars have some mount hence I will look the mount from scrapyard or some local mechanic.

[~Zombie~]

Can the dzire clock be installed in Swift VDI first generation? It doesn't come with an ambient temperature. BCM has pin provision for sensor wires. BCM are different for Dzire VDI and Swift VDI?
Or I need to install Dzire BCM to get the clock to work?

[chiranjitp]

Originally Posted by ~Zombie~

Can the dzire clock be installed in Swift VDI first generation? It doesn't come with an ambient temperature. BCM has pin provision for sensor wires. BCM are different for Dzire VDI and Swift VDI?
Or I need to install Dzire BCM to get the clock to work?

From whatever research I have done, Dzire VDi clock can't be installed in Swift VDi (as in everything will work except the temperature part). First the BCM is different between them, secondly Swift VDi doesn't get an ambient temperature sensor. Dzire VDi gets an ambient temperature sensor. In my Swift ZXi the ambient temperature sensor was already there because of the ACC (Automatic Climate control).

[~Zombie~]

Originally Posted by chiranjitp

From whatever research I have done, Dzire VDi clock can't be installed in Swift VDi (as in everything will work except the temperature part). First the BCM is different between them, secondly Swift VDi doesn't get an ambient temperature sensor. Dzire VDi gets an ambient temperature sensor. In my Swift ZXi the ambient temperature sensor was already there because of the ACC (Automatic Climate control).

Correct. I bought a Dezire dash clock, and its not showing temperature. On BCM, there is a E46 connector, whose pin no 8 and 11, grounds and supplies power(6V) to the sensor. I bought dezire ambient sensor, connected the pins in E46 connector,to my utter dismay, the pin is not supplying 6 volts to sensor, ground has continuity/resistance though.

If BCM is swapped with dzire BCM, then immobiliser is a concern.

[Ashtoncastelino]

Originally Posted by ~Zombie~

Correct. I bought a Dezire dash clock, and its not showing temperature. On BCM, there is a E46 connector, whose pin no 8 and 11, grounds and supplies power(6V) to the sensor. I bought dezire ambient sensor, connected the pins in E46 connector,to my utter dismay, the pin is not supplying 6 volts to sensor, ground has continuity/resistance though.

If BCM is swapped with dzire BCM, then immobiliser is a concern.

You have to connect the Ambient Temperature sensor wires to the E46 connector's pin number 8 and 10, not 11 like you mentioned. Another seperate wire goes from BCM G37 connector to the Clock(yellow wire from clock named BCM) which gives the temperature readings to the Clock.

Attaching below the Diagrams from Service manual just for your reference.
Hope I could help.

Regards
Ashton Castelino

[~Zombie~]

Thanks.
I made a mistake there. Ambient temperature is connected via pin 8 & 10 on E46 connector, pin 11 on G37 connector transmits signal to clock.

Pin 10 is not showing the voltage, sensor has resistive load, fixed resistor on power feeding 6 volts and a variable resistance one inside sensor housing.
I was contemplating taping 6 volt supply from somewhere else, but fixed resistor on oower supply is a question.
I ordered a swift JDM clock, which has display of clock, temp and fuel consumption.
Trying to get last two working now.

[Ashtoncastelino]

Originally Posted by ~Zombie~

Thanks.
I made a mistake there. Ambient temperature is connected via pin 8 & 10 on E46 connector, pin 11 on G37 connector transmits signal to clock.

Pin 10 is not showing the voltage, sensor has resistive load, fixed resistor on power feeding 6 volts and a variable resistance one inside sensor housing.
I was contemplating taping 6 volt supply from somewhere else, but fixed resistor on oower supply is a question.
I ordered a swift JDM clock, which has display of clock, temp and fuel consumption.
Trying to get last two working now.

AFAIK , there's no seperate wire for the Fuel consumption as it is shared with the same pin 11 in the G37 connector of the BCM which gives the temperature reading and the fuel consumption. Although you'll have a extra wire in your clock for the security system which I'm not sure how it is wired.