Question about 2014 Toyota Prius

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Prius 2014 head light high bean work but low bean are really low. Light bulbs are ok but low bean doesn't have enough power. Low watts?

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You have a bad ground.

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If i was to change headlight globes from 55 watt low/65 watt high to xenon halogen 90 watt low/100 watt high is there any problems


Most OE factory wiring is marginal as far as amperage carrying capability goes. They installed wiring fine for the stock bulbs and switch. A lot of vehicles send power to the lights..head and running...through the light switch on the dash. This causes it's own problems as switches are the weak link in the lighting system.

If you run 100watt bulbs you will need to power the bulbs via a 40 amp relay switched by the light switch so the switch does not carry the amperage load through it's contacts.

Doing so will reduce the voltage drop to the bulbs as a 2 volt drop will cause the bulbs to be only 75% as bright as they would be with the full 13.5 volt running voltage..

You run a fused wire from the battery or power distribution block to the relay that should be mounted within 6 inches of the closest h/l bulb. Then from the relay to the head light bulb/s. The front and rear running lamps can remain as factory as they are low amperage draw and original light switch will work because you now no longer run power to the h/lamps through the switch.

Search the www for schematics for relay switched lamps.


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Mar 12, 2014 | Cars & Trucks

2 Answers

How can i tell my low beam lights are out


check fuses.
check head light relays.

Mar 11, 2014 | 2011 Suzuki Kizashi

1 Answer

Fludic verna headlight is very poor???chould i add cutout and use more 100/90 w bulb to get more light...which cutout brand is good


The standard lights are quite good enough if the reflectors and lens are really shiny and not partially rusted. Large bulbs run the risk of melting the plastic reflectors costing new head lights. Adjusting the head lights to correct beam height will also help. You can use relays in the system. Disconnect the wires to the back of the bulbs and attach then to the trigger pins of the relay (4 relays-2 high beam L+R and 2LBeam L+R). Run fused power wires from the battery to the power pin of the relay and out to the beam pin of the bulb. earth the bulbs as normal. The operation works like this You switch on the lights to low beam and the power from the switch energises the relay and drops in the contacts which allows power from the battery ,through the bulb low beam to earth. Switching to high beam energises the relay and allows power from the battery through the relay and out to the high beam part of the bulb through to earth. You have full 12 volts to the lights and reduced current through the light switch. 4 relays --1 each for each light low and 1 each for each light high. jump the wire from each beam position between relays of the same light so that they work off the one wire from the switch

Dec 10, 2013 | 1991 Suzuki Swift

2 Answers

Prius high beam lights work but low beam lights do not work?


On a 2008 Prius, If both High beams work but only one side has working low beams, then it is most likely a fuse. So before breaking your knuckles to change the bulb, check the fuse first. I found out the hard way as my mom distressed to me that her drivers side headlights were out. So without checking to see if low and high were working, I proceeded to remove and replace the bulb - ouch! There are 4 10 amp fuses that protect the circuits for low/high beam function. They are under the hood in the fuse box on the drivers side and they are marked on the box cover. Check them before changing the bulb.

Oct 29, 2012 | 2006 Toyota Prius

2 Answers

My low beams keep shutting on and off but high beams are fine


this could be solved by taking the bulb out of its holder and cleaning the contact of the bulb and holder.
turn the ignition on after this with the bulbs in the holder and plugged in but not in the headlight kitself.Turn the lights on and see if the work if still the same try moving the bulb while on in its older and see if its just loose. if so holding it one way it will work. wedge something something to hold it in place or buy a used bulb holder.
Check the fuses at the same time and the wire plug that powers the bulb. check and clean the contacts of these also
Let me know how it goes and ill help again if it persists.
bakerboy11@hotmail.com
Automobile

May 17, 2010 | 1994 Dodge Ram

3 Answers

High beam headlights quit working. Bulbs are OK.


If your getting power at the headlight wire harness, then it's going to be the bulb it self, but make sure your checking the right 12 volt terminal at the plug. There should be three terminals there, there is a ground, 12 volt low beam, and a 12 volt high beam. If both the low and high 12 volts are getting power, then it's going to be the head light bulb it self that has reached the end of it's life time since the day time running lights are always on which is the high beams. Good luck and check the fuse box under the hood by the battery. 

Aug 25, 2009 | 2003 Pontiac Sunfire

1 Answer

Brake light problem Corolla 97


the tail light and brake lights are working from double contact bulbs. check the grounding, you dont have enough ground from one of the bulbs

May 30, 2009 | 1997 Toyota Corolla

1 Answer

1999 Chevrolet Astro Van problem


the head lights have tree wires goig to it one groun one gets power when high beams on the 3rd gets power only with low beam on test the wires or try by plugin a good known head light to conector if it works with low beam then replace both head ligts because head light come with two bulbs in one high and low

Jun 02, 2008 | 1999 Chevrolet Astro

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