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The left head light is out as well as the high beams are not working. What is the problem?

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  • Cars & Trucks Master
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Probably more than one problem.
The left low beam being out is probably the bulb, but it could also be a fuse, since each bulb has its own. The left low beam could also have a bad ground if the fuse and bulb are good. Try switching the left and right bulbs.
The high beams are probably not the bulbs or fuses because it is unlikely both would go out at once. More likely is the relay. Find it in the fuse box, and feel for a click when hi/low selector lever activated. If there is a click, it is probably the relay. If not, it is probably the selector lever. You could tell with a test light on the primary at the socket where the relay plugs in.

Posted on Jul 22, 2010

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  • Cars & Trucks Master
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A bulb on one side and new light stalk switch

Posted on Jul 22, 2010

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Posted on Jan 02, 2017

joecoolvette
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SOURCE: head light not working on high beam

When dealing with wiring on a vehicle, it can go from something real simple, to something real complicated, in a hurry!

1.Checked to make sure the headlights have high beam? Bulbs are good in that respect? Not trying to insult your intelligence, but sometimes it's the simple things we overlook. Again, not trying to sound 'Uppity', but do you have access to a type of jumper wire, that has a needle type of tip on both ends? This way you can stick the needle tip, into the wire that has 'juice' for the low beam side of the headlight, and touch the high beam side. See if the high beam comes on.

2.Sometimes it's as simple as a bad ground. There is a wire, or wires, that come out of the headlight wire loom, and have a rounded metal terminal end. A machine screw, goes through the hole in this rounded metal terminal end, and fastens it to the metal sheet metal of the body.

The metal frame of a vehicle, and the metal sheet metal, is the ground for a vehicle.
A lot of times, where this rounded metal terminal end is fastened to the sheet metal, (Or frame), rust can develop between them. Between the metal terminal end, and the sheet metal. This makes a bad contact for grounding.

There is enough of a ground source for low beam headlights, but not enough for the additional draw of the high beams.

3.In the headlight wire loom, there is a Fusible Link. This looks like a 1, or 2, or 3 inch large bump in the wire. This fusible link is designed to melt inside, and break contact, should it need to. Sometimes it's readily apparent when you view this fusible link. It will have the plastic covering melted on one side, or partially around. Sometimes it's not so obvious. (Isn't wiring fun(?)
You just have to use the probes, (Needle tip is real nice here), on a multimeter, (Set to DC voltage, and the 50 volt scale), and track from battery to headlight switch, to headlights.

4.Lastly, it may be the headlight switch itself.

Posted on May 06, 2009

  • 14036 Answers

SOURCE: My low beams are not working but the high beams are

IT LOOKS LIKE THE DIMMER SWITCH.

Posted on Jul 26, 2009

  • 4977 Answers

SOURCE: Low beam head lights not

if the fuses are good then you need to check for power and ground at the headlight plug that attaches to the headlight bulb if you have a good power and ground there and the connections are good then the bulbs are both no good.or if you can tell the bulbs are burnt out by looking at them then you don`t have to check powers and grounds.you also can directly feed power and ground to the bulb and check both the terminals for high beam and low beam as you cannot tell which is which by looking at the terminals

Posted on Mar 04, 2011

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1 Answer

While low beams on the left high beams stays on dim light but wen I turn high beams on they work fine


It could be driving lights mode instead of low beam. Check connections.

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the switch supplies power to the relays that switch on the lights according to the position you have it at
so on high beam there will be 2 high beam lights working
on low beam there will be 2 low beam lights working
back to passing lights or flashing head lights , both beams will work so the switch is the last item to consider
Now with only one side beam not working it comes back to the ground on that light for that bulb
remember that electricity follows the path of least resistance so it the ground is bad the current will ground out through another point including a light which will switch that light off or make it not work
remember the brakes light that flask when an indicator is used --same thing

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procedure is to place the car on level ground 3 feet from a wall that reflects the head light
draw a cross on the wall at the height of the center of head light lens
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Most likely the high beam filament is burnt out on your left light, and the low beam filament is burnt out on your right light. My first recommendation would be to purchase a couple of headlamp bulbs, install them and see how they work, then post back if you are still having an issue

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