The AUSubaru.com.au Forums

Posted: **Sat Jul 07, 2007 9:43 pm**

while driving the tacho will just go springing back and forth by about 1000rpm it is also effected when i flick the lights on or the thermo's any ideas would be much appreciated

Posted: **Sat Jul 07, 2007 10:01 pm**

funnily enough i just installed my tacho, works fine untill i turn the lights on as well... whats the gos ppl

Posted: **Sat Jul 07, 2007 10:23 pm**

glad i'm not the only one

Posted: **Sun Jul 08, 2007 12:39 pm**

voltage regulator thingy on the back of the dash ?

Posted: **Sun Jul 08, 2007 2:05 pm**

i thought this means your alternator was on the way out.. seen these symptoms in a few RX's with dead alternators

Posted: **Sun Jul 08, 2007 2:31 pm**

just checked alt still putting in just over 14v

Posted: **Tue Jul 10, 2007 2:11 pm**

Generally menas the alternator is sad or the reg on the alternator is being bad like mine atm

Posted: **Tue Jul 10, 2007 2:18 pm**

alternator is toast, even tho its still putting out 14v

i have had this twice in different L's.

jumping tachos, flickering lights, stereo dropping in and out

both times fixed with alternator being replaced.

my 2cents

Posted: **Tue Jul 10, 2007 5:27 pm**

could also be a bad ground between the dash and the chassis

Posted: **Tue Jul 10, 2007 5:39 pm**

mine works when the lights are off but when i turn them on it plays up but if i put the dash lights up to full it works no worries again.. im guessing the tacho might be damaged,

Posted: **Tue Jul 10, 2007 8:22 pm**

Happened to me once - it turned out to be faulty regulator (after 2 days ignoring it it went up to 17volts as it went off the voltage gauge and checked out whoa so i disconnected it and run off battery to auto electrician's) - I cannot remember how much, it was about 4 yrs ago and wasn't Subaru but it shows similar symptoms.

Pinch one from wreckers

Cheers
AP

Posted: **Tue Jul 10, 2007 9:48 pm**

thanks for your replys i have spare l series wagon to pinch one off to give it a go

Posted: **Tue Jul 17, 2007 10:38 pm**

just changed regulator today still not any different any more ideas would be appreciated

Posted: **Tue Jul 17, 2007 10:48 pm**

wt regulator got changed

i thought he wuld be meaning alternator sayin it went up to 17 volts etc

Posted: **Tue Jul 17, 2007 11:43 pm**

my tacho was doin this n then wat u no the alternator died

Posted: **Wed Jul 18, 2007 10:55 am**

Didn't someone suggest voltage regulator (think that is correct term) on back of the DASH. pull dash out and on the board top left is a yellow thingy all on its own

Posted: **Wed Jul 18, 2007 2:15 pm**

jono wrote:Didn't someone suggest voltage regulator (think that is correct term) on back of the DASH. pull dash out and on the board top left is a yellow thingy all on its own

Is this a servicable item?

My low beams tend to do this little dimmer thing from time to time, sometimes i wonder if they're actually going to turn off and not come back on... fun times! Doesn't do it on highbeams either, only low beams.

Cheers

Posted: **Thu Jul 19, 2007 9:09 pm**

the little voltage regulator you are talking about is does it only regulate power to tacho? will it only be in sub's with a tacho?

because i have a spare suby for parts but it is dl wagon "no tacho"

Posted: **Fri Jul 20, 2007 1:09 am**

always had a auto electrician diagnosing this on various cars and fixing it by replacing it. dunno where he got his spares. he is now deceased

Posted: **Sat Jul 21, 2007 2:51 pm**

had same problem with my first L-series post tacho dash conversion.

Everyone (mates, none of them auto-electrians) said after 10 seconds of careful consideration, 'bad earth' like they knew what they were talking about...

Put up with it for a while, hoping it would go away. It didn't

In the end, ran an earth lead from the instrutment cluster to car. Tacho problem fixed...'they' were right.

D'oh

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tacho going wacko ea82

tacho going wacko ea82