Headlight 'pulse'

Aug 14, 2004 14 Replies
N

Had to change from working days to working nights. I've been noticing other vehicles had a 'pulse' to their headlights....now my truck has the same disease. Pulse is noticable in all lights, even when the door is open and cabin light is on, along with the dash lighting. Haven't had this particular problem before, so I could use some help. What's the most likely cause? Alternator/regulator/both?? What is the test procedure?



Battery is 1yr old and is the right one for the truck. New battery cables about 1 mth ago. No previous electrical problems.



Thanks, I appreciate any help.



Dave S(Texas)



Vote
Twitter Facebook LinkedIn
J

It's the magenteic effect caused by extratressial craft entering our atmospher, it happens pretty regularly these days, just check out movies men in black I and II and you will see what i'm talking about.

JS

Vote
Twitter Facebook LinkedIn
T

diesel ?

might be glow plugs cycling

Vote
Twitter Facebook LinkedIn
S

What year and make of truck? What engine and options? More info required b4 ANY logical answer can be wagered.

Vote
Twitter Facebook LinkedIn
D

On Sat, 14 Aug 2004 18:36:19 -0400, Joe Sumbody rearranged some electrons to form:

"extraterrestrial"... "magnetic"..."atmosphere"...

Looks like the aliens have affected your spell checker. Or maybe it's just the drugs you're on.

Vote
Twitter Facebook LinkedIn
T

check the ground from the regulator to body

then ground from body to battery negative

then unplug and re-plug the regulator plug

if still doing it, I'd replace regulator first (10 bux at AutoZone), then alternator

Vote
Twitter Facebook LinkedIn
S

I think I'd pop a regulator on it, AFTER I checked all the grounds. Including the connection between the battery and block, and especially the body ground(s) where ever they might be.

Vote
Twitter Facebook LinkedIn
P

at AutoZone), then

OK, thanks. I did have to 'fashion' a new ground to body connection when I replaced the Neg battery cable, so that could be the problem. The OEM cable had a soldered clamp that connects the cable to the frame. I guess my solder job isn't quite the as good as the OEM connection. I appreciate yours and Steves responses.

Dave S(Texas)

Vote
Twitter Facebook LinkedIn
T

yeah, me too

but it turned out to be the diode that was blown outa the case (gone completely)

Vote
Twitter Facebook LinkedIn
J

You have a diode in your alternator that has conked out. So now your alternator stops charging briefly during each revolution. You can ignore it for a while if you want to.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required