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Standing current of VW Golf R
Further to a post a few weeks ago, about the battery being flat in my car
after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! |
Standing current of VW Golf R
On 30/05/2020 09:22, Smolley wrote:
Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! That sounds like a wiring problem. A mate of mine had a similar problem in the 70's with a 60's car, that turned out to be a failed on/off switch on the radio (this had no lights to indicate it was on, and didn't make a sound tuned between stations). IIRC it was drawing an amp or so. Slightly different, but the reason my ATV battery was going flat even when used regularly was that the glow plug timer relay had failed, so these were drawing 20 amps or so, well over the charging current on idle. |
Standing current of VW Golf R
On Sat, 30 May 2020 08:22:22 -0000 (UTC), Smolley wrote:
snip This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! How long did you leave it measuring for? When you connect the ammeter you are effectively re making the circuit and it will then go though any diagnostics etc until it goes into sleep mode. Cheers, T i m |
Standing current of VW Golf R
On Sat, 30 May 2020 08:22:22 -0000 (UTC), Smolley wrote:
Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! The current will start high, but will settle down after a few minutes as things go to sleep. You need to wait for a while before measuring the quiescent current draw. |
Standing current of VW Golf R
On Sat, 30 May 2020 09:53:06 +0100, T i m wrote:
On Sat, 30 May 2020 08:22:22 -0000 (UTC), Smolley wrote: snip This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! How long did you leave it measuring for? When you connect the ammeter you are effectively re making the circuit and it will then go though any diagnostics etc until it goes into sleep mode. Cheers, T i m The meter was connected across the knife switch before the circuit was opened, so it shouldn't have seen any break in supply. |
Standing current of VW Golf R
In article ,
Smolley wrote: Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! You need to make sure everything is allowed to go to sleep mode before measuring the quiescent current. 3.6 amps would run the battery flat in less than one day. A normal figure would be more like 0.03 amps (30mA) -- *Most people have more than the average number of legs* Dave Plowman London SW To e-mail, change noise into sound. |
Standing current of VW Golf R
In article ,
Smolley wrote: On Sat, 30 May 2020 09:53:06 +0100, T i m wrote: On Sat, 30 May 2020 08:22:22 -0000 (UTC), Smolley wrote: snip This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! How long did you leave it measuring for? When you connect the ammeter you are effectively re making the circuit and it will then go though any diagnostics etc until it goes into sleep mode. Cheers, T i m The meter was connected across the knife switch before the circuit was opened, so it shouldn't have seen any break in supply. You need to leave it for say 20 minutes or so, and check again. -- *Horn broken. - Watch for finger. Dave Plowman London SW To e-mail, change noise into sound. |
Standing current of VW Golf R
On 30/05/2020 09:22, Smolley wrote:
Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! fire imminent ... -- This email has been checked for viruses by AVG. https://www.avg.com |
Standing current of VW Golf R
On 30/05/2020 09:22, Smolley wrote:
Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! The standing current once it has finished all its power on self tests and become quiescent is likely to be in the range of about 30-100 mA. It varies a bit with the car, model and how many LEDs it decides to flash. -- Regards, Martin Brown |
Standing current of VW Golf R
On Sat, 30 May 2020 09:38:27 -0000 (UTC), Smolley wrote:
On Sat, 30 May 2020 09:53:06 +0100, T i m wrote: On Sat, 30 May 2020 08:22:22 -0000 (UTC), Smolley wrote: snip This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! How long did you leave it measuring for? When you connect the ammeter you are effectively re making the circuit and it will then go though any diagnostics etc until it goes into sleep mode. The meter was connected across the knife switch before the circuit was opened, so it shouldn't have seen any break in supply. Fairy muff (and good idea), so how long did you observe it for after opening the switch? Cheers, T i m |
Standing current of VW Golf R
That sounds like a wiring problem. A mate of mine had a similar problem in the 70's with a 60's car, that turned out to be a failed on/off switch on the radio (this had no lights to indicate it was on, and didn't make a sound tuned between stations). IIRC it was drawing an amp or so. valves ?... -- This email has been checked for viruses by AVG. https://www.avg.com |
Standing current of VW Golf R
Dave Plowman (News) presented the following explanation :
You need to make sure everything is allowed to go to sleep mode before measuring the quiescent current. I agree, some electronics wake up, even with just a slight change in voltage across them. 3.6 amps would run the battery flat in less than one day. A normal figure would be more like 0.03 amps (30mA) My car, loaded with electronics, sleeps at 20mA, with an odd higher short pulse, which I assume is for the alarm system. |
Standing current of VW Golf R
What on earth is it doing?
Brian -- ----- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "Smolley" wrote in message ... Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! |
Standing current of VW Golf R
In article ,
Jim GM4DHJ ... wrote: That sounds like a wiring problem. A mate of mine had a similar problem in the 70's with a 60's car, that turned out to be a failed on/off switch on the radio (this had no lights to indicate it was on, and didn't make a sound tuned between stations). IIRC it was drawing an amp or so. valves ?... You'd have heard the vibrator... -- *Growing old is inevitable, growing up is optional Dave Plowman London SW To e-mail, change noise into sound. |
Standing current of VW Golf R
In article ,
Harry Bloomfield wrote: Dave Plowman (News) presented the following explanation : You need to make sure everything is allowed to go to sleep mode before measuring the quiescent current. I agree, some electronics wake up, even with just a slight change in voltage across them. 3.6 amps would run the battery flat in less than one day. A normal figure would be more like 0.03 amps (30mA) My car, loaded with electronics, sleeps at 20mA, with an odd higher short pulse, which I assume is for the alarm system. That's good. I've got quite a bit of extra junk on the old Rover, much of it home designed/installed. And couldn't get it down under 30mA. The original central locking took about 10mA. Got that down to under 1mA. -- *Any connection between your reality and mine is purely coincidental Dave Plowman London SW To e-mail, change noise into sound. |
Standing current of VW Golf R
On Sat, 30 May 2020 13:49:30 +0100, T i m wrote:
On Sat, 30 May 2020 09:38:27 -0000 (UTC), Smolley wrote: On Sat, 30 May 2020 09:53:06 +0100, T i m wrote: On Sat, 30 May 2020 08:22:22 -0000 (UTC), Smolley wrote: snip This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! How long did you leave it measuring for? When you connect the ammeter you are effectively re making the circuit and it will then go though any diagnostics etc until it goes into sleep mode. The meter was connected across the knife switch before the circuit was opened, so it shouldn't have seen any break in supply. Fairy muff (and good idea), so how long did you observe it for after opening the switch? Cheers, T i m About 100,000 counts |
Standing current of VW Golf R
On 30/05/2020 14:29, Dave Plowman (News) wrote:
In article , Jim GM4DHJ ... wrote: That sounds like a wiring problem. A mate of mine had a similar problem in the 70's with a 60's car, that turned out to be a failed on/off switch on the radio (this had no lights to indicate it was on, and didn't make a sound tuned between stations). IIRC it was drawing an amp or so. valves ?... You'd have heard the vibrator... indeed |
Standing current of VW Golf R
On 30/05/2020 14:26, Brian Gaff (Sofa) wrote:
that audis only VAG cars share most components. The user interface maybe Volkswagen or Audi or Skoda or SEAT specific but the underlying components and low level software are the same. |
Standing current of VW Golf R
On 30/05/2020 14:21, Brian Gaff (Sofa) wrote:
What on earth is it doing? Brian Powering the hundreds of CPUs that modern cars use. |
Standing current of VW Golf R
Brian Gaff (Sofa) wrote
What on earth is it doing? Deciding how to **** over the individual who has dared to modify the beautifully designed kraut car. "Smolley" wrote in message ... Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! |
"Who or What is Rod Speed?"
"Who or What is Rod Speed?
Rod Speed is an entirely modern phenomenon. Essentially, Rod Speed is an insecure and worthless individual who has discovered he can enhance his own self-esteem in his own eyes by playing "the big, hard man" on the InterNet." https://www.pcreview.co.uk/threads/r...d-faq.2973853/ -- Richard addressing senile Rodent Speed: "**** you're thick/pathetic excuse for a troll." MID: |
Standing current of VW Golf R
On 30/05/2020 20:00, Rod Speed wrote:
Brian Gaff (Sofa) wrote What on earth is it doing? Deciding how to **** over the individual who has dared to modify the beautifully designed kraut car. "Smolley" wrote in message ... Further to a post a few weeks ago, about the battery being flat in my car after standing idle for a few weeks. I subsequently charged the battery in the house using a laptop power supply and a couple of headlight bulbs in series to deliver a charging current of ~2 amps over several days. I eventually put the battery back in the car and fitted a knife switch isolator. Yesterday I went out in the car and returned after about 10 miles. This morning after the engine fan had stopped I measured the standing current across the open knife switch and was surprised to see the meter was reading 3.26 amps. No wonder the battery flat! with hundreds of plastic parts that don't last long ... |
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