Tachometer Fixed with Cheap Batteries - BMW E30 DIY Project ep15

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The tachometer on my E30 was broken, so I couldn't see what RPM my engine was running at. I fixed it by replacing the original CR14250SE lithium batteries with some much cheaper and readily available CR2 batteries (a.k.a. 1/2 AA batteries). The old batteries were welded on, but we won't need to do any welding to replace them :-)
CR2 batteries Shopee link - shope.ee/4fM9YE4TFk
This is my 1991 BMW E30, 318i, with M40 engine. Right hand drive, made in Malaysia. I am restoring it on my own, right here at home, in my porch, with some hand tools. The plan is to get the car to a "good working condition" so that I can use it as my main / only car. Subscribe to my channel to follow my progress - I also maintain a playlist of all my videos of this car: • BMW E30 DIY Project Ca...

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24 июл 2024

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Комментарии : 42

@PorchGarage Год назад

Shopee link for the CR2 batteries I used - shope.ee/4fM9YE4TFk

@milosdermisek282 12 дней назад

Great video! Thank you very much!

@stevensmith8285 Год назад

You the man!

@steviestevereno Год назад

Nice!

@davidwashington8549 Месяц назад

Working on this on my 89 e30 cabrio. It has the motometer. When I got to this step( 7:57 ) the batteries were super corroded and they are a much much bigger size (like a aa). Should be fine, I’ll jump with wire but kinda funny. The board is also vdo even though the cluster is motometer

@PorchGarage Месяц назад

I think you should match the voltage. An actual AA battery's voltage will be too different - should be fine if the old and new batteries have the same voltage 🤔

@davidwashington8549 Месяц назад

Yeah. I’ll validate. I just thought it was funny how they are different sizes. Thanks for making the video. Very helpful all around

@malcolmneme6924 Год назад

Thank you!. Just picked up am E30 and the tachometer doesn't work. I'll try this!

@PorchGarage Год назад

Hope it works for you

@malcolmneme6924 Год назад

@@PorchGarage thank you. I'll keep you posted

@foul-vk9zi Год назад

My e30s speedometer is sometimes at zero...the sometimes reads speed inaccurately can you do one on the speedo

@PorchGarage Год назад

Perhaps you can try the suggestions on E30Zone: www.e30zone.net/forum/viewtopic.php?t=279606

@jihncommy1193 Год назад

What are the symptoms? My fuse is burning like hell, will this be a fix?

@PorchGarage Год назад

Hi. For me it was only the tachometer and speedometer which worked intermittently. I don't think the batteries would cause problems with the fuses.

@Jack-hicham Год назад

hello, you did not need to remove the steering wheel? Thanks for you feedback

@PorchGarage Год назад

Did not need to remove the steering wheel 😊

@Jack-hicham Год назад

@@PorchGarage thank you! 👍👍

@selespeed3 25 дней назад

my green LEDs always light up when i turn on ignition switch. It goes off after turnign on engine. IS this also due to bad batteries?

@PorchGarage 25 дней назад

Sorry, i haven't got a clue. Are you sure it's not just normal behavior like newer cars? Anyway a lot of the stuff I've found regarding the E30 has been on E30Zone: www.e30zone.net/e30wiki/index.php?title=Instruments#Dash_Lights www.e30zone.net/forum/search.php?keywords=Tachometer&terms=all&author&sc=1&sf=titleonly&sr=posts&sk=t&sd=d&st=0&ch=300&t=0&submit=Search

@selespeed3 24 дня назад

@@PorchGarage thanks. I also consult this website. But I wonder what the SI batteries are really for other than powering the tachometer. Are they also used to store service indicator lights memories?

@frankfinney4304 Месяц назад

Where can I buy these batteries? Great video. Thanks!

@PorchGarage Месяц назад

Hi. I think they are used for some old cameras, so maybe film shops will have them - I'm not sure. Should be easy enough to find online - look for CR2 batteries

@zainalidris7323 Год назад

Where did you get the batteries from?

@PorchGarage Год назад

Any CR2 battery will do. I bought from Shopee - shope.ee/4fM9YE4TFk

@EliasRizk53 Год назад

I have the early model cluster The rpm isn’t working, so I should change the batteries?

@PorchGarage Год назад

Sorry, i have no idea. Maybe you can check on the E30Zone wiki and forum

@mullerman1104 3 месяца назад

@Elias did you find the source of the problem already?

@EliasRizk53 3 месяца назад

@@mullerman1104 no I didn’t

@EliasRizk53 3 месяца назад

Best option to buy a new cluster

@mullerman1104 3 месяца назад

@@EliasRizk53 Do the Interior lights work? If not it’s a fuse.

@moza260 6 месяцев назад

2:15 whats that exclamation point sensor for?

@PorchGarage 6 месяцев назад

Hmm, I'm not sure. Maybe a check engine light? www.e30zone.net/e30wiki/index.php/Instruments#Check_Light

@moza260 6 месяцев назад

or maybe brake fluid level?

@ludwig_der_grobe Год назад

My original batteries are ok, 3 volts each. where is my issue?

@PorchGarage Год назад

Sorry, no idea... Perhaps you can check the E30 Zone forums - www.e30zone.net/forum/search.php?keywords=Tachometer&terms=all&author=&sc=1&sf=titleonly&sr=posts&sk=t&sd=d&st=0&ch=300&t=0&submit=Search

@Carlos-hb4gu Год назад

Inicialmente reemplacé las dos baterías como se indica en el video, pero ni el tacómetro ni el indicador de consumo de combustible ni la computadora de abordo (OBC) funcionaron. Por lo anterior revisé el cableado y encontré que en el splice S319 estaban rotos 3 cables de los 7 que se encuentran en S319. Uní los 7 cables con soldadura de Estaño y en seguida todo funcionó. El splice S319 se encuentra en el cableado que está abajo de la bocina del conductor y los cables son de color rojo/verde.

@ludwig_der_grobe Год назад

I will check, thank you !!!