Wiring, Stereo & Electronics Audio Components | Radars | Alarms - and things that spark when they shouldn't

Electrical problem

Old Sep 20, 2002 | 01:44 AM
  #1  
WEASEL's Avatar
Thread Starter
TECH Resident
 
Joined: Nov 2001
Posts: 770
Likes: 0
From: the third rock from the sun!
Default Electrical problem

Within the past 2 weeks my headlights and interior lights have started "pulsing". It's not noticeable when driving but seems pretty bad when parked, particularly right after I crank it. The interior pulsing is really visible at night.

The pulses are more visible at idle but if I rev the motor, they increase until they're hardly noticeable. If I put my foot on the brake pedal while in park, the pulses don't seem as visible either.

The motor cranks strong and the voltage meter only drops below halfway if I have all the accessories on otherwise it's normal.

It's a '99 A4 with an ASP crank pulley and Optima yellow top. The pulley's been on maybe 25k miles and the Optima's been in a year, maybe 12k miles.

Got any ideas?
Reply
Old Sep 20, 2002 | 06:34 AM
  #2  
WILWAXU's Avatar
TECH Senior Member
20 Year Member
iTrader: (6)
 
Joined: Nov 2001
Posts: 14,378
Likes: 1
From: League City, TX
Default Re: Electrical problem

Moving to Electronics section.
Reply
Old Sep 20, 2002 | 11:26 AM
  #3  
GREEN GOBLIN's Avatar
TECH Resident
20 Year Member
 
Joined: Jul 2002
Posts: 782
Likes: 1
From: Left Of Self-Centered
Default Re: Electrical problem

DAMNIT!!!! <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> Mine's doing it too, I notice it when I'm on a dark road and go to hit the brakes.....PULSE! I talked to my mechanic and he said it was common amongst the cars, I still am pissed though, mine's a 2002 M6. <img border="0" alt="[Banging Head]" title="" src="graemlins/gr_banghead.gif" />
Reply
Old Sep 20, 2002 | 01:14 PM
  #4  
WEASEL's Avatar
Thread Starter
TECH Resident
 
Joined: Nov 2001
Posts: 770
Likes: 0
From: the third rock from the sun!
Default Re: Electrical problem

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by EXTREME RACING T/A:
<strong>DAMNIT!!!! <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> Mine's doing it too, I notice it when I'm on a dark road and go to hit the brakes.....PULSE! I talked to my mechanic and he said it was common amongst the cars, I still am pissed though, mine's a 2002 M6. <img border="0" alt="[Banging Head]" title="" src="graemlins/gr_banghead.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">This is like a constant pulsing mainly when the car is in park but I can pull the hand brake up and put the car in reverse, neutral, or drive and it still does it.

The best I can type and describe it is...

waawaawaawaawaawaa....without the sound <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> . If I rev the motor it's...

wawawawawawawawawa... It's really getting on my nerves.

Any ideas?
Reply
Old Sep 25, 2002 | 01:45 PM
  #5  
Y2K1 SS 5.0 THIS's Avatar
On The Tree
 
Joined: Mar 2002
Posts: 122
Likes: 0
From: Tempe, AZ
Default Re: Electrical problem

They all do that, thank GM for that one. Once your moving and the car comes to a cruising speed it doesnt do it anymore, just at idle.
Reply
Old Oct 1, 2002 | 11:29 PM
  #6  
WEASEL's Avatar
Thread Starter
TECH Resident
 
Joined: Nov 2001
Posts: 770
Likes: 0
From: the third rock from the sun!
Default Re: Electrical problem

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Y2K1 SS 5.0 THIS:
<strong>They all do that, thank GM for that one. Once your moving and the car comes to a cruising speed it doesnt do it anymore, just at idle.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No no! Trust me, this is not normal. I'm on my third 4th gen Fbody.

It doesn't go away but the increased frequency may make it look like it does when I'm driving around.

I'm used to the occassional "blink" or dimming when I hit the brakes or the fan or air pump comes on. This isn't the same thing.

Ever take a light switch and sloooowly push it to see at what point the light turns off? Usually it will dim first. It's like that but a constant rythmic pulsing.
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 02:22 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE