tacho problems

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steve_k
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Post Wed Jun 16, 2021 12:08 pm

Any electrical experts on here?
Got a very strange problem with my 325i.
Came to bleed the coolant today & when I start the engine the rev counter is dead,
But if I turn the engine off & put the key in the start position then turn the fan on full both the mpg gauge & the rev counter move, yet won't budge when I start the engine,
The temp gauge & full gauge both move off their stops whether I run the engine or not.
Anyone got any ideas? As I'm stumped
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
steve_k
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Post Wed Jun 16, 2021 12:10 pm

forogot to add, i checked the battery in the boot & the voltage was a bit low at 10.5v so thats now on charge.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
steve_k
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Joined: Fri May 23, 2008 11:00 pm
Location: in the vale of mansfield

Post Wed Jun 16, 2021 12:40 pm

well after a bit of reading i'm leaning towards the SI board batteries being dead or very near, thankfully i've got a spare SI board & the batteries are showing a healthy 3.25V so fingers crossed this should fix the issue.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)
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Bonymaenjack
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Post Wed Jun 16, 2021 12:57 pm

steve_k wrote:
Wed Jun 16, 2021 12:40 pm
well after a bit of reading i'm leaning towards the SI board batteries being dead or very near, thankfully i've got a spare SI board & the batteries are showing a healthy 3.25V so fingers crossed this should fix the issue.
Sounds like it is the batteries but ? , my rev counter/ OBC etc failed to show any life and I visually checked the fuses which seemed ok and left the car a day or two . In the meantime I bought a set of instruments off a fellow zoner (which I'll now keep as a spare set) I did a recheck using a multi meter to check the fuse box where I discovered that there was an open circuit on fuse 10 . Getting older isn't improving my eyes sight or pocket
steve_k
E30 Zone Team Member
E30 Zone Team Member
Posts: 8044
Joined: Fri May 23, 2008 11:00 pm
Location: in the vale of mansfield

Post Wed Jun 16, 2021 1:02 pm

Bonymaenjack wrote:
Wed Jun 16, 2021 12:57 pm
steve_k wrote:
Wed Jun 16, 2021 12:40 pm
well after a bit of reading i'm leaning towards the SI board batteries being dead or very near, thankfully i've got a spare SI board & the batteries are showing a healthy 3.25V so fingers crossed this should fix the issue.
Sounds like it is the batteries but ? , my rev counter/ OBC etc failed to show any life and I visually checked the fuses which seemed ok and left the car a day or two . In the meantime I bought a set of instruments off a fellow zoner (which I'll now keep as a spare set) I did a recheck using a multi meter to check the fuse box where I discovered that there was an open circuit on fuse 10 . Getting older isn't improving my eyes sight or pocket
thanks for that i'll have a look at fuse 10 later.
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
getting oral sex off an ugly person is like rock climbing.....don't look down ;)