Question about 2003 Toyota Tundra

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2003 Tundra. Low beams not working. High beams and fog work ok. Checked lamps, fuses, and relays.

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I suspect the stalk switch is faulty but i would need to test it first with my multimeter first before i changed it .so get you meter and check it out first

Posted on Mar 22, 2011

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Posted on Jan 02, 2017

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2 Answers

High bam and fog lights that just stopped working


Disconnect one of your headlamps and use a multimeter to figure out the positive low beam and ground on the wiring, then using the ohm meter function check the high beam wiring back to the fuses and relays.
If I remember correctly, the fog lights are supposed to turn off when you turn on the high beams. So that switch system may need to be looked into on the controls.

Aug 16, 2016 | 2003 Ford Explorer Sport XLT

2 Answers

Can't get power to foglights on my 2003 Explorer


Power is applied to the fog lamp switch which is a separately controlled part of the main light switch. When the fog lamp switch is turned on, power is applied to the fog lamp relay in the battery junction box which closes to turn on the fog lamps IF 20A FUSE 19 and 15A FUSE 44 in the BJB are OK. Setting the multifunction switch to HI closes the high beam relay in the BJB, removing power from the fog lamps and directing it through 20A FUSE 46 in the BJB to the high beam lamps. In other words, you can have fog lamps or high beam lamps but not both at the same time

the multifunction switch is set to HI, the high beam relay in the battery junction box closes

Oct 20, 2014 | 2003 Ford Explorer

2 Answers

No headlights or fog lights


I suspect it is the headlight switch

Mar 18, 2014 | 2004 Pontiac Grand Am

1 Answer

Integration relay


check the lamp itself to be sure it isnt burned out... check the main fuse and relays under the hood... check for bad wires throughout the lighting system (time consuming and tedius)

Feb 11, 2014 | Toyota Tundra Cars & Trucks

1 Answer

High beam indicator comes on with fog lights


Could your Mazda have daytime running lights? If you checked all fuses, did that include the three in the joint box?

There is an auto light-off control module that is central to all functions you describe. It is assumed that you would only turn on the fog lights with headlights on and set for high beam. If you set the headlight switch to LOW, the module closes the headlight relay to turn on the low beams. If you then turn the headlight switch to HIGH, the module turns on the high beams and allows you to turn on the FOG LIGHT switch, closing the fog light relay and turning on the fog lights. Since this sequence is not working, I suggest checking both high beam lamps as both could be burned out. Other possibilities are a defective headlight switch or the module

Oct 01, 2012 | 2005 Mazda 6

1 Answer

2003 sunfire ..... low beams were working one minute ,shut off car for two minutes got back in car started it ,now i have no low beams or fogs.i checked bulbs and fuses both are good , could it be the DRL...


Headlamps
The headlamps are operated when the driver places the headlamp switch in the HEADLAMP position. The LT HDLP and RT HDLP fuse in the IP fuse block, supply battery positive voltage to both the left and right headlamps. The low beam and high beam circuits continue to the headlamp switch. Depending on the position of the dimmer switch, either the low or high beam circuit will now have a path to ground. Ground is provided at G204. The low beam and high beam circuits also provide the body control module (BCM) with both low and high beam inputs. The headlamp switch includes the dimmer and the flash-to-pass switch.
If the headlight switch is left in the HEADLAMP position, the headlights will remain on until turned off or the battery runs dead.
Daytime Running Lamps (DRL)
Any function that turns on the headlights will cancel the daytime running lamps operation. The LT HDLP fuse in the IP fuse block supplies battery positive voltage to the daytime running lamp (DRL) relay coil circuit. The DRL relay switch contacts are connected to the low beam circuit. When the headlamp switch is placed in the OFF position, the BCM will turn on the daytime running lamps. The BCM energizes the DRL relay, closing the switch contacts and grounding the low beam circuit at G204. The DRL illuminate the low beam headlights at a reduced intensity. The DRL will operate when the ignition switch is in the RUN position, the gear selector is not in the PARK position and the parking brake is released. When these conditions have been met the DRL will illuminate.
DRL operation in Manual Transmission equipped vehicles will occur when the ignition switch is in the RUN position, and the parking brake is released.

Probably the dimmer switch . But without testing that would be just a guess . Turnning the headlamps on Any function that turns on the headlights will cancel the daytime running lamps operation..
No ,don't think the DRL relay has anything to do with it .

View wiring diagrams an testing the electrical circuits at the dimmer switch would be the proper way to diagnose .

Mar 06, 2018 | 2003 Pontiac Sunfire

1 Answer

Fog lamps dont work i check fuses and relay the switch shows the fog lamps are on


If you have not replaced the headlamp with HID, the next thing, are the high beams on ?

If you turn the high beams on, the indicator lamp on the main headlamp switch should go out.

Next thing would be to check the fog lamp relay in the fuse panel ( passenger side kick panel by the fuel inertia switch ).

The fog lamp relay is a half size ISO relay, you should be able to swap with the trailer tow parking lamp relay ( R201 ), to test with.

The fuse you checked is the F17, the fog lamp fuse for Relay R202, correct ?

Nov 26, 2009 | 2006 Ford F-150

1 Answer

High beam not working


yes there is have you checkt the high beam ligts. there is one lamp tho the low beam ligts (50w) usaly and there is one lamp tho the high beam ligts usaly (100w)

Jun 08, 2009 | 1999 Daewoo Nubira

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