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Discussion in 'Sidewinders Bar & Grille' started by heltershelton, Sep 24, 2018.
Tell her to pull the headlight fuse and see if it still happens
Once your engine is up-&-running, your alternator powers everything, & also goes about recharging the battery for the next start-up.
Your battery powers the accessories with the ignition on, & no motor running.
Do as the others have mentioned ! Good advice !
Sometimes a loose alternator drive-belt can slip silently when under-load, failing to deliver the goods.
Most cars since the 1980's have a voltage-regulator screwed into the back of the alternator, that often houses spring-loaded brushes, that often wear out, & are a wear & tear item just like tubes in amps...
The voltage regulator is generally an inexpensive part, & shouldn't take too-long to fit-up if found faulty.
I'm saying all-of-this so that she doesn't get caught out by a greedy trades-person, who "may" tell her the whole alternator is "kerput"...Meaning big $$$ to overhaul or replace...
If shes in Fl, you're in Tx, and she doesn't know anything about cars, I wouldnt have her work on electrical. Have her go to a reputable shop after you've given her your diagnosis. That way a pro will fix her up, and you'll come out lokking like the guy with all of the answers.
thanks for all the replies.
Too broad of a topic for a simply answer without asking more questions first:
1) How old is the battery?
2) How many miles on alternator?
3) Does she drive long enough distances to fully charge battery, or short hops?
4) Has battery electrolyte level been checked (if a wet battery)?
5) Does battery go dead if the car sits a few days?
And so forth...
she didnt tell me any of that. she has a headlight that wont go back down. she told me shes gonna rewire some stuff.
Tell her to get a real car
Are the pop-up headlights controlled by a solenoid or vacuum? If solenoid, that may be the issue.
If she’s not sure what the issue is, she shouldn’t be rewiring; that’s a great way to not only make the problem worse, but harder to diagnose, too.
I am handy with a wrench. But when it comes to the electric systems in today's cars, I am lost. The battery in my car would loose charge overnight. I could jump the car, get it started, and the alternator would charge the battery. Drive the car to work, go about my business, and everything is fine. Park the car at night and the next morning the battery would be dead. I thought that I had a bad battery. I replaced the battery and the problem continued. I took it to the Honda dealership and the mechanic found the problem. It was an air conditioner relay switch that failed and caused the battery to discharge overnight. I would have been dollars ahead if I had taken the car to a mechanic with the appropriate diagnostic equipment in the first place.
i have no idea. its a miata with all new wiring......some kind of custom stuff.
shes pretty handy with stuff like that......she does cyber security for the air force and shes always wiring systems up and doing all kinds of high tech stuff.
and i think they are sending her back to the big cat litter box in jan for the third time.
Oh, OK. That's different. In your first post it sounded like she didn't know her way around car stuff, but if she can wire up a network she can probably work her way through a car's circuit without any trouble.