Question about 1999 Oldsmobile Alero

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Why do the park lights come on but no headlights?

Power to the headlights in both wires

Posted by Anonymous on

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  • Oldsmobile Master
  • 1,326 Answers

Bad switch

Posted on May 06, 2015

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Posted on Jan 02, 2017

  • 422 Answers

SOURCE: No headlights, or dash lights.

check the ground cable at the battery , youll see a break in the ground wire at the battery box, check to make sure the bolt is tight and not corroded (the break is the ground for most of the lighting )

Posted on Aug 25, 2008

  • 1 Answer

SOURCE: headlights work but no front or rear park lights

my jeep grand cherokee has had this same problem, as have many i've seen on the road. the tail light socket has contacts that provide the electrical connection. sometimes the contacts get weak and do not make good contact causing lights not to work. try removing the socket and pulling contacts up a little or also putting a small piece of aluminum foil around the contact will work.

Posted on Aug 08, 2009

skychief2001
  • 21873 Answers

SOURCE: 1999 olds alero

The black wire in the harness is the ground circuit. The actual ground connection is around the back seat.
If you think the ground circuit is open you can splice into the wire and ground it near one of the tail lamps.

Posted on May 13, 2013

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1 Answer

Problem with parking back lights on my school bus I changed all the fuses and nothing my headlights work reverse lights work


Do the front park lights work? The front and rear park lights should be on the same circuit. If no park lights operational, possible switch or power/ground issue. If only rear park lights not working, suspect burned out bulbs/wiring problem to rear lights

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Do the reverse lights operate normally with the headlights off? The reverse lights are on an entirely different circuit than than the park/headlights. In order for them to come on with the park/headlights, there will have to be a short to power on the circuit. Will the park lights come on if the vehicle is put in reverse with the headlight switch off? Look for shorted/corrodded wiring in the rear taillight circuit and connector plugs. Green corrossion in/around any plug or wiring is a sure sign of a problem

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Where do I locate the fuse of the headlights in a 1984 jeep


Don't believe there is one for headlights. Your jeep is too darn old: I can see wiring diagrams going back to 1986 at a site, so I looked at one for an '86 CJ7. Unfortunately not a complete headlight wiring diagram, however, so you're getting a two bit answer, with inflation worth about 10 cents. lol.

The headlight switch gets power from a fusible link (Fuse link A) that looks like it may be located on the starter solenoid terminal- two fuse links- A & B, there somewhere. But this same fusible link A also supplies power to the fuse block with the park/tail lamps, hazards, brake lights, and a couple others. So if you have stop lights and park lights, then the fusible link is good, so you should have power to the headlight switch. Neither the fuse block, nor the instrumentation diagram, shows any fuses for the headlights. A lot of older vehicles did not have headlamp fuses, because the light switch had a built-in circuit breaker.

My guess is you have a bad dimmer switch, or the connection there may be bad. Or check if you have power to the headlight socket with the light switch on, and if you do, there may be a headlight ground problem.

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Schematic_Diagram 93 lincoln town car tail lights and license plate light.


Sounds like either your wiring from the Light switch is bad or the Light switch itself is bad. Check with your Owners manual to see if the "Parking lights" have a separate fuse.

Your tail and License plate lights would light with either the Headlights or the "Parking" light selected at the switch as would the front parking lights. If all lights except the headlights are out, your problem is closer to the light switch than at the mounting points of each Parking light or License plate light.

This is one case where you will not know if a dead wire off of the switch is dead because of a bad switch or a bad wire. You would have to detach the harness at the switch, test the wire bundle or jump the switch with power to see how it distributes power through the Harness. It will take a lot of time to rule out the switch. It may be cheaper to replace the switch and then work from there.

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UNDERCOVER VEHICLE NEED TO TURN HEADLIGHTS OFF WHEN MOTOR IS RUNNING WHEN SURVEILLANCE


Most of the time with a GM type vehicle to get the headlights off while engine is running and vehicle is in park you just have to put the parking brake on only a click or two. That or sometimes you have the ability to turn them off by the headlight switch which is normally turned to automatic. If you turn it all the way to the right it should turn them off.

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Car would not start, cleaned all the battery connections and started the car, now headlights do not work, parking lights do, i have power to bulbs on the middle wire, no power to the outside wires on...


Most cars have a Headlight relay and within the relay different terminals will split the power to parking lights, headlights, etc. It is possible that part of the relay burned out while the balance still works. You may have a fusible link (wire) to the relay box for just the headlights. A good Autoparts place should show the requirements.

I suspect the bad connection on the battery caused the Starter to draw power or a ground through the easiest path of least resistance. This shorted the grounded Relay.

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Headlights both went out last night. High beams


There is a relay that controls the headlights, volvo calls it a step relay. You will have to check that power is getting to this relay. If not, check all fuses and wiring. If power supply checks out ok, you may have to replace the relay. Let me know if you need any more info or a wiring diagram.

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1 Answer

Headlights work but no front or rear park lights


my jeep grand cherokee has had this same problem, as have many i've seen on the road. the tail light socket has contacts that provide the electrical connection. sometimes the contacts get weak and do not make good contact causing lights not to work. try removing the socket and pulling contacts up a little or also putting a small piece of aluminum foil around the contact will work.

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Headlight wiring diagram for 1972 Corvette


chilton profellional power accessory and wiring diagrams manual 1968-73pps 666-674. I have it right in front of me. but don't have means of transmitting. any ideas? swamprat73@hotmail.com

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1 Answer

No parking lights on my 1993 Jeep Cherokee


Recap of my problem:
no parking lights, have headlights, light switch seems to have sweet spot that turns on both head lights and parking lights.

Solution is:
Blown fuse on 15, it works the radio, parking lights, dome lights.

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