What is a "voltage Damper"
#1
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Hello, does any know what a "voltage damper" is?
What does it do?
Can it go bad?
Is it part of the charging system? Intricate to it?
I think the part # is LJB3743B or AB
but that says lead Link, is that the same as a voltage damper?
This part (voltage damper) is part of the alternator wire harness. Between alternator and the main fuse box.
Thanks for replies and
Happy Motoring...
What does it do?
Can it go bad?
Is it part of the charging system? Intricate to it?
I think the part # is LJB3743B or AB
but that says lead Link, is that the same as a voltage damper?
This part (voltage damper) is part of the alternator wire harness. Between alternator and the main fuse box.
Thanks for replies and
Happy Motoring...
#2
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Sounds like another description of the term "voltage regulator", which would serve to avoid excessive current/voltage from the alternator to the car's electrical systems, especially where the alternator (and car) are running at speed.
If that's the case, it would be both intricate and essential to the charging, and all other electrical systems.
Hopefully others will give you better information.
If that's the case, it would be both intricate and essential to the charging, and all other electrical systems.
Hopefully others will give you better information.
#3
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Hi, I think the voltage regulator is built into the alternator. I think when you get a new alternator you get a new regulator built into the alternator.
Please correct me if I am wrong!
The voltage damper is listed as a separate part from the alternator.
So I think it may be a different part.
Thanks for the reply.
Happy Motoring...
Please correct me if I am wrong!
The voltage damper is listed as a separate part from the alternator.
So I think it may be a different part.
Thanks for the reply.
Happy Motoring...
#4
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LJB3743AB is the lead link (a.k.a. wire) to the alternator suppression module (a.k.a. voltage damper) part number LJA1820AA .
From JTIS:
"Although the output from the generator is finely controlled and relatively smooth, it is still a pulsed DC output at a varying frequency proportional to engine speed.The suppression module damps out any ripple which may be sensed on the main output of the generator. This prevents possible interference via the power supply, affecting the radio reception or, where fitted, the telephone.The module is located on the right hand side of the engine compartment adjacent to the generator. It is secured to a mounting bracket by three bolts. The mounting bracket is bolted to the inner panel, just above the chassis leg. The illustration shows the suppression module viewed from below the vehicle.A fuse is fitted internally to the suppression module to protect the generator output in the event of a short circuit within the suppression module."
From JTIS:
"Although the output from the generator is finely controlled and relatively smooth, it is still a pulsed DC output at a varying frequency proportional to engine speed.The suppression module damps out any ripple which may be sensed on the main output of the generator. This prevents possible interference via the power supply, affecting the radio reception or, where fitted, the telephone.The module is located on the right hand side of the engine compartment adjacent to the generator. It is secured to a mounting bracket by three bolts. The mounting bracket is bolted to the inner panel, just above the chassis leg. The illustration shows the suppression module viewed from below the vehicle.A fuse is fitted internally to the suppression module to protect the generator output in the event of a short circuit within the suppression module."
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someguywithajag (08-09-2018)
#5
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Originally posted by WhiteXKR
That was the only other thing i could find.
But he says it's part of the alternator wiring harness, which threw me.
Now your on the case i will happily defer to your superior knowledge WhiteXKR (since i couldn't even get my cam covers off without your help
)
The suppression module
But he says it's part of the alternator wiring harness, which threw me.
Now your on the case i will happily defer to your superior knowledge WhiteXKR (since i couldn't even get my cam covers off without your help
![Big Grin](https://www.jaguarforums.com/forum/images/smilies/biggrin.gif)
#6
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Originally posted by WhiteXKR
That was the only other thing i could find.
But he says it's part of the alternator wiring harness, which threw me.
Now your on the case i will happily defer to your superior knowledge WhiteXKR (since i couldn't even get my cam covers off without your help
)
That was the only other thing i could find.
But he says it's part of the alternator wiring harness, which threw me.
Now your on the case i will happily defer to your superior knowledge WhiteXKR (since i couldn't even get my cam covers off without your help
![Big Grin](https://www.jaguarforums.com/forum/images/smilies/biggrin.gif)
![Icon Doh](https://www.jaguarforums.com/forum/images/smilies/icon_doh.gif)
#7
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#8
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someguywithajag (08-09-2018)
#10
#11
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Howdy Folks:
As I remember from the sixties, when aftermarket car stereos started getting popular, I rigged some homebrew dampers (line filters) that incorporated both voltage dampers (condensers from line to ground) and current dampers (chokes/coils in line ) that actually did reduce or eliminate noise.
As I remember from the sixties, when aftermarket car stereos started getting popular, I rigged some homebrew dampers (line filters) that incorporated both voltage dampers (condensers from line to ground) and current dampers (chokes/coils in line ) that actually did reduce or eliminate noise.
#12
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Howdy Folks:
As I remember from the sixties, when aftermarket car stereos started getting popular, I rigged some homebrew dampers (line filters) that incorporated both voltage dampers (condensers from line to ground) and current dampers (chokes/coils in line ) that actually did reduce or eliminate noise.
As I remember from the sixties, when aftermarket car stereos started getting popular, I rigged some homebrew dampers (line filters) that incorporated both voltage dampers (condensers from line to ground) and current dampers (chokes/coils in line ) that actually did reduce or eliminate noise.
Pyramid and others still make such coil+capacitor filters. A little OT, but my MGA has -- I'm not making this up -- a mechanical voltage regulator. A relay sits there vibrating with its on/off times creating the regulation. A very dirty voltage source is what you get. Without a noise filter, a modern radio in this car gets in trouble in a hurry.
Last edited by Dennis07; 07-14-2012 at 07:26 AM.
#13
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Well, having spent half an hour looking at the electrics I believe this is a figment.
There's nothing in the JTIS electrical called 'supression' and the only ref. to 'damper' is the active shock absorbers.
The output from the alternator goes to the starter motor and then through a 250 A fuse to the battery.
I'd guess each module has its own internal filtering which needn't be much more than a capacitor.
'Generator Hash' was a real problem on vehicles fitted with a dynamo which generated all sorts of nasty harmonics. It was a particular problem for vehicle using high power transmitters but seems to have gone away with alternators.
There's nothing in the JTIS electrical called 'supression' and the only ref. to 'damper' is the active shock absorbers.
The output from the alternator goes to the starter motor and then through a 250 A fuse to the battery.
I'd guess each module has its own internal filtering which needn't be much more than a capacitor.
'Generator Hash' was a real problem on vehicles fitted with a dynamo which generated all sorts of nasty harmonics. It was a particular problem for vehicle using high power transmitters but seems to have gone away with alternators.
#14
#15
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Well, having spent half an hour looking at the electrics I believe this is a figment.
There's nothing in the JTIS electrical called 'supression' and the only ref. to 'damper' is the active shock absorbers.
The output from the alternator goes to the starter motor and then through a 250 A fuse to the battery.
There's nothing in the JTIS electrical called 'supression' and the only ref. to 'damper' is the active shock absorbers.
The output from the alternator goes to the starter motor and then through a 250 A fuse to the battery.
See diagram for 2002 4.0 below:
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steveinfrance (07-14-2012)
#17
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I got my hands to one and opened it
Phillips Condensator 22000uF and 50 volts![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
It can be found from JTIS "Electrical - 415-01 Audio Unit - Removal and Installation - Capacitor " Articale 86.10.33
Might my Harman Kardon Premium Audio bass distortion problems (on high volume) be caused by this (if my 98 car has bad one)?
Part is engine bay right front next to air Condencer Drier
For images check
http://1drv.ms/1qq4xqw
http://1drv.ms/1qq4GtV
Br,
T
Phillips Condensator 22000uF and 50 volts
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
It can be found from JTIS "Electrical - 415-01 Audio Unit - Removal and Installation - Capacitor " Articale 86.10.33
Might my Harman Kardon Premium Audio bass distortion problems (on high volume) be caused by this (if my 98 car has bad one)?
Part is engine bay right front next to air Condencer Drier
For images check
http://1drv.ms/1qq4xqw
http://1drv.ms/1qq4GtV
Br,
T
Last edited by tlindi; 11-05-2014 at 03:25 PM. Reason: Details related to Audio System
#18
#19
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It's possible that a failed (open-circuit, they can literally dry out) capacitor could cause distortion - possibly
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