Toyota Innova Owners & Discussions [continued 3]

**Deestone** · August 24th, 2020 08:52 PM

Is it possible to interchange low and high beam H4 bulb? I recently replaced both bulbs and I felt that when I switch on low beam right side becomes high beam and left is low beam and when I swich on hi-beam vice versa happens. If possible then I have to bring it back to have it back-job.

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**bxr monkey** · August 24th, 2020 09:03 PM

Originally Posted by Deestone

Is it possible to interchange low and high beam H4 bulb? I recently replaced both bulbs and I felt that when I switch on low beam right side becomes high beam and left is low beam and when I swich on hi-beam vice versa happens. If possible then I have to bring it back to have it back-job.

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Baka na-swap ang pag kabit ng sockets?

**babkalakal** · August 24th, 2020 09:04 PM

Originally Posted by Deestone

Is it possible to interchange low and high beam H4 bulb? I recently replaced both bulbs and I felt that when I switch on low beam right side becomes high beam and left is low beam and when I swich on hi-beam vice versa happens. If possible then I have to bring it back to have it back-job.

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kung purely bulb swap virtually impossible. however a botched relay installation if upgrading bulbs was done possible.

**Deestone** · August 25th, 2020 09:57 AM

Originally Posted by babkalakal

kung purely bulb swap virtually impossible. however a botched relay installation if upgrading bulbs was done possible.

No this is not purely bulb swap. I bought a new wiring harness complete with wires, fuse, relays and socket paired with new H4 bulb as my old socket got toasted. The electrician even tested it low and high beam making sure that it is correct but when im using it at night something seems off with the low and hi-beam.

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**bxr monkey** · August 25th, 2020 10:13 AM

Originally Posted by Deestone

No this is not purely bulb swap. I bought a new wiring harness complete with wires, fuse, relays and socket paired with new H4 bulb as my old socket got toasted. The electrician even tested it low and high beam making sure that it is correct but when im using it at night something seems off with the low and hi-beam.

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Try i swap ang LH at RH bulbs. Kung nag swap din ang symptoms, possible bulb defect.

**Deestone** · August 25th, 2020 10:15 AM

Originally Posted by bxr monkey

Try i swap ang LH at RH bulbs. Kung nag swap din ang symptoms, possible bulb defect.

Okay thank u I will just have it check again by electrician I fear that I cannot put it back once I unplug the bulb.

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**dr. d** · August 25th, 2020 10:30 AM

Originally Posted by Deestone

Is it possible to interchange low and high beam H4 bulb? I recently replaced both bulbs and I felt that when I switch on low beam right side becomes high beam and left is low beam and when I swich on hi-beam vice versa happens. If possible then I have to bring it back to have it back-job.

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H4 is H4.
US law even requires that they be completely inter-changeable, without the need to re-adjust headlight aim.

one possible explanation to your problem is error in the external wiring.

but before you tear thru the wiring,
check first the... bulb socket seating.

i recently had problem with my innova's headlight aiming.
i had the mekaniko replace the headlight housings, as they had become cataractic.
but the headlight beams afterward were un-satisfactory.
no amount of aiming would give me the desired effect.
i finally traced the problem to bulb socket seating.
whoever installed the bulb+socket, did not seat the socket correctly into the headlight housing.

you can actually see if the seating is correct, by comparing the left and right headlights from the front (that is, assuming one of them is seated correctly).
examine closely the metal ring that is the bulb's collar, and how it seats against the housing. they should seat perfectly flat and evenly all around. compare left and right very meticulously. the difference may be 1-2 mm only.

yes, installing the socket onto the housing is a blind, muscle-memory-only process of sleight of hand. the most difficult part there is the ngawit ng kamay.
if you really can not do it, you can remove the headlight housing and see how it's done.. it's only a couple of bolts and a pull here and there. it's not like the lancer cedia, wherein you have to bring down the bumper first! heh heh.

good luck.

addendum: you will have to move backward the engine air filter housing and the battery, to give your hand more work space. loosen or remove their restraining bolts.

**Deestone** · August 25th, 2020 10:35 AM

Originally Posted by dr. d

H4 is H4.
US law even requires that they be completely inter-changeable, without the need to re-adjust headlight aim.

one possible explanation to your problem is error in the external wiring.

but before you tear thru the wiring,
check first the... bulb socket seating.

i recently had problem with my innova's headlight aiming.
i had the mekaniko replace the headlight housings, as they had become cataractic.
but the headlight beams afterward were un-satisfactory.
no amount of aiming would give me the desired effect.
i finally traced the problem to bulb socket seating.
whoever installed the bulb+socket, did not seat the socket correctly into the headlight housing.

you can actually see if the seating is correct, by comparing the left and right headlights from the front (that is, assuming one of them is seated correctly).
examine closely the metal ring that is the bulb's collar, and how it seats against the housing. compare left and right very meticulously. the difference may be 1-2 mm only.

yes, installing the socket onto the housing is a blind, muscle-memory-only process of sleight of hand. the most difficult part there is the ngawit ng kamay.
if you really can not do it, you can remove the headlight housing and see how it's done.. it's only a couple of bolts and a pull here and there. it's not like the lancer cedia, wherein you have to bring down the bumper first! heh heh.

good luck.

This is what i do I aim at the wall yesterday night and the aim was different from left and right H4 bulb low beam and hi beam it seems one is low and one is high and vice versa whenever i switch on low and high beam that is when I think that the electrician might have reverse it or as you said the socket might be not in the right position.

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**dr. d** · August 25th, 2020 11:13 AM

serious!
disconnect the socket or the wiring harness plug.
un-install the headlight housing.
study and install correctly the bulb+socket.
re-install the housing.
connect the wiring harness plug.
5-10 minutes per headlight.

**yapoy86** · August 25th, 2020 11:14 AM

Originally Posted by Deestone

This is what i do I aim at the wall yesterday night and the aim was different from left and right H4 bulb low beam and hi beam it seems one is low and one is high and vice versa whenever i switch on low and high beam that is when I think that the electrician might have reverse it or as you said the socket might be not in the right position.

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if walang ginalaw sa wirings, malamang na wala sa tamang slot yung bulb sa housing.. pero kung nag palit ka ng ceramic socket malamang may baligtad ang kabit

kung nakatingin ka sa H4 bulb yung
left terminal "|" common,
top terminal "-" low
right terminal "|" high