Question about 1993 Mazda 929

1 Answer

Headlight switch relays

All tail lights work Except tail lights when headlamps are on. Have turn and brake lights with or without lights on. No tail lights indicator illuminated on dashboard. Only able to locate headlamp fuse under the hood not blown visibly. Would the tail light relay be probable cause for that part of circuit?

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  • Expert
  • 176 Answers

Headlight switch probably the problem. One circuit is shutting off when the other turns on. If it was a fuse or relay, it would just turn off...

Posted on May 14, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Mike258
  • 1498 Answers

SOURCE: Lo-beams not working

Hi manolonusa,

It may have something to do with your headlights, but my first thought is they are just a symptom of another problem.

I'd check on the alternator. If the ALT fails, a good battery will keep the car running for quite a while. Sometimes the first symptoms are the dimming of the headlights. So:

  • Make sure belts are tight.
  • Get a meter and test the output voltage while its running (be careful when doing this).
  • Check the voltage at the battery when stopped and when running.
  • Same thing with headlights on and off.
Get back to me with the results. Once the alternator is ruled out we can check a possible headlight problem. But this way, at least you won't be stranded somewhere with a dead battery.


Posted on Sep 08, 2008

  • 86 Answers

SOURCE: Mazda 626 electrical problem

hello do you have a tow bar and trailer plug .if so check that first.get back if you dont .we can go from there

Posted on Jun 23, 2008

  • 35 Answers

SOURCE: passenger side headlamp wont light up

I'm assuming globe means bulb. I have replaced many bulbs that look fine, and that turns out to be the problem. But to stop you from chasing down a problem that isn't there, test the connector that attaches to the bulb. Should be power there with the head lights on. There should be a fuse, and a relay. The fuse is under the dash or on the side of the dash near the door hinges, I'm just not sure if this car would have seperate fuses for L headlight and R headlight. But you should check power first at the connector.

Posted on Feb 26, 2009

heavymetal77
  • 721 Answers

SOURCE: High beam headligts will not come on + no dash

Sounds like a bad switch to me. If it was a relay,it would not work period.Not to mention, the switch controls the dash lights too.

Posted on Jun 22, 2009

  • 43 Answers

SOURCE: brake light fuse

Take a look at the wiring to the brake lights. It is quite possible that over the years one of the wires has rubbed against another enough to short out, causing the blown fuses.

Posted on Jul 17, 2009

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1 Answer

2000. Where is fuse for tail lights?


Do your headlamps work ?
Park/Marker/License/Tail Lamps
Voltage is applied to the turn/headlamp switch at all times. When the turn/headlamp switch is in the PARK or the HEAD position, voltage is applied to the following components:
?€¢
The park lamps


?€¢
The marker lamps


?€¢
The tail lamps


?€¢
The license lamp

The front marker lamps are grounded through the turn filament of the respective front park/turn lamp. The front marker lamps light as a result.
The automatic lamp control function turns on the park lamps and the headlamps. This action occurs when the ambient light sensor determines that the exterior lamps should be turned ON based on the amount of available light. When the BCM grounds the park lamp relay, voltage is supplied directly to the park lamps, bypassing the turn/headlamp switch assembly. When this action occurs, the following conditions exist:
?€¢
The automatic lamp control relay is grounded.


?€¢
The headlamps turn ON. Refer to Headlights/Daytime Running Lights (DRL) Circuit Description .

The lamps turn OFF when the BCM does not ground the park lamp relay or the automatic lamp control relay. This action is caused by the following conditions:
?€¢
The available light reaches a predetermined level.


?€¢
The ignition switch is turned to the OFF position

Mar 31, 2016 | Pontiac Grand Am Cars & Trucks

2 Answers

I have a 2007 Chevy HHR..the tail light don't work the bulbs workI have turn signals and brake lights..no owners manual in car. check fuses can't locate the fuse for tail light is there another place


Your talking about the rear park lamps, but, do the front park lamps work?
Note the picture.
Underhood fuse box, 68 is park lamp relay, 69 is park lamp fuse.
26139691-ogmtu0xiyqttvnd1jjcu4dmt-2-0.jpg

Mar 23, 2016 | Cars & Trucks

1 Answer

Need to know if anyone has had a problem with dash lights and tail lights not working


Fault tracing needed;
Test for power
1-To headlamp switch
2-Out headlamp switch w/park and/or headlamps requested on...

Mar 02, 2015 | 1995 Chevrolet Blazer

1 Answer

2001 Monte Carlo SS 3.8 v6 Rear park lights are out as well as the dash lights, brake lights work headlights work front running and park lights work, all turn signal lights work. replaced headlight switch...


Park, Tail, Marker Lamps, and License
The park, tail and marker lamps, including the license lamps, turn on when the headlamp switch is placed in either the PARK or the HEAD position, or anytime the headlamps are requested. The RT I/P #1 fuse in the RH I/P fuse block supplies battery positive voltage to both the park lamp relay switch contacts and to the park lamp relay coil circuit. The park lamp relay coil is controlled by the body control module (BCM). When the headlamp switch is placed in the PARK position, the BCM energizes the park lamp relay coil control circuit.
Current flows from the park lamp relay switch to both front and rear park lamp fuses and to their respective park/tail lamps. The front park lamps are grounded at G101. The rear park lamps are grounded at G302. The license plate lamps are a part of the rear park lamp circuit and are grounded at G302. The inadvertent power control feature prevents the park lamps from remaining on more than 10 minutes if left on. If the park lamps are turned on after the ignition switch has been turned OFF, or is in the ACCY position, they will remain on until turned off or until the battery runs dead.

Did you the REAR PARK LP fuse 15 amp in the right insturment panel fuse box.

Jul 18, 2017 | 2001 Chevrolet Monte Carlo

1 Answer

1979 ford f 250 parking lights and tail lights work. no headlights and no brake lights. fuses are good.


Your head light switch is the only other thing besides a relay if you have one in your vehicle. call the dealer ask for parts and ask them if they have a relay that runs your headlamps and tail lights if they do I would change it first if they say their is no realy replace your headlamp switch in the dash.

Dec 04, 2010 | Ford F-250 Cars & Trucks

1 Answer

Brakes Lights dont work on a 2006 Chevy Silverado


I've worked on these the first drove me crazy. its the turn signal switch every thing runs thru these. head lights, turn signal, brakes. except the third brake light. it runs directly from the brake switch. go figuare

Jun 22, 2010 | 2003 Chevrolet Tahoe

4 Answers

Tail lights do not work. Bulbs are good. Both fuses are good(separate cicuits). What else could it be? Is there a relay involved? Could the switch be defective? thanks! Mike


All the exterior lights run threw the turn signal switch. Except the high mount brake light. If you are talking about brake lights replace the TS switch. Parking lights are a little different. If you have no parking lights front and back, TS switch. If you have front and no back, ground problem. Grounds for the back are usually on the drivers side mounted to the frame.

Aug 01, 2009 | Hyundai Motor 2005 XG350

1 Answer

Problems with brake lights on my 2000 Jeep Grand Cherokee


YES -- process of elimination. Obviously there's a short circuit in the Brake/Headlight circuits - right? Blown fuse(s) is/are evident of this -- would you agree? Which fuse(s) is/are blowing? An analysis tells you that the only time a fuse blows is when the headlamps are turned on -- correct? Otherwise, brake lights work normally -- right? OK. Head lamps have relays which turn them on. Here's a wiring diagram of the 2000 Hyundai Sonata (NOT the Jeep Grand Cherokee)
7a9e354.jpg a663f53.gif It would appear the problem is with one or more bulbs or sockets or both. As you many notice, there are no connections between the headlamps and brake lamps except the parking lamps (which share the bulbs/sockets)
c7068ec.gif When the headlamps are turned on, so does the tail lamp relay. As you can see, these bulbs/sockets are 'DUAL' filament to ground (series-parallel circuit). Just a guess here - the short is in one of the lower rear brake/parking lamp bulbs/sockets.... just a guess.

Jun 19, 2009 | Hyundai Motor 2004 Sonata

1 Answer

''96 Silverado no tail lights.


if that doesn't help, you might want to check the bulbs. the damage might have shorted which burned out the bulbs. but you do have one wire that runs to the rear and splits off to the tail lights. the wire should run back to the head light switch via a fuse. the headlights have its own relay. but i hope it is just a fuse.

Dec 10, 2008 | 1996 Chevrolet K1500

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