Question about 2003 Chevrolet Silverado 1500

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Tail lights won't work. fuse is good, bulbs are good. has to be a wiring issue. I tested voltage on everythin in the sockets and the wiring harnesses for each light and the main wiring harness tha

Fuse is good, bulbs are good. has to be a wiring issue my guess is a short. I tested the voltage in each socket and the wire conector plugging in to the light board. I also tested the voltage to main wire harness that supplies the wires splitting off to each llight board. I have voltage to everything until the bulbs are in then i lose my voltage in the wire before it would even be at the bulb. Any one have any ideas. This is a 91 Chevy 1500 with a 5.7L V8.

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A short blows fuses - you have a situation where the voltage is either not reaching your bulbs or possibly a bad ground.

See if you get a hold a schematic for car so you can trace out the power and locate the anomaly.

Posted on Jun 17, 2017


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SOURCE: 91 chevy s-10 tail light short

You certainly have a short somewhere, and tracking down shorts are not ever easy. I would check the dash switch itself, especially if it was working fine before and nothing else was done.

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SOURCE: Right turn or brake light not working

Questions? Do any of your brake lights work? Including Center Stop? Do your parking/taillights lights work? All your bulbs are multi-filiment bulbs that work through mulitple sources. Knowing which bulbs are doing what under all conditions might help narrow down the problem. Meanwhile, check for continuity between, stoplight switch and multifuntion switch (white wire). Also, check DrkBlue/White from MFSw. to Boby Control module. BE SURE to use a low inpedance tester to protect your modules. The DrkBl/Wh wire is your rigth side input. I may be a good idea while testing these wires to wiggle them to look for intermitent shorts.

Posted on Jan 30, 2009

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SOURCE: i was wiring a four prong plug into the round plug

When this happens it normally blows a fuse. Did you check the fuses for continuity with a volt meter? Sometimes it is hard to see if a fuse is blown by looking at it. If the fuses are ok check under the back of the vehicle, look at the wires to see if the insulation is in good condition and the wire did not burn into. Although if this had happened you would have most likely seen white smoke.

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SOURCE: how do i replace tail light harness with socket in a cavalier 01

if you have a complete replacement harness it unplugs behind the felt in the trunk. if it is just a socket with a pigtail clip wires about an inch from old socket and use but splice connectors and use electrical tape to cover them back up with.

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SOURCE: 05 Chevy Colorado trailer harness right turn not working

you must check the connection where the truck harness meets the added trailer harness on the truck itself not the trailer harness.

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Hi, I have a 2004 Suzuki Aerio Sedan, the Tail light do not come on. I have checked the bulbs and they are good. I checked fuses and not is burned. Is there a relay that controls tail lights?

I don't know if there is a relay but the head light switch controls the taillights You can check the auto parts store and see if they have a listing for a taillight relay otherwise You will need an electrical tester or test light. First connect one side of the test light or meter to a good ground.Take the probe of the test light and test the fuse on both sides and make sure it lights. If it is good on both sides try testing for voltage at the tail light sockets With the light switch turned on, If you have voltage at the socket you could be missing the ground to the tail light bulbs.or you could have bad bulbs or corroded sockets.An other possibility if no voltage is at the sockets you could have a defective headlight switch.Beyond that you will need a factory service manual with wiring diagrams or a detailed manual such as Mitchel's or one from Alldata

Dec 04, 2014 | 2004 Suzuki Aerio


Troubleshoot your lights

Fixing lights can be difficult:

You have a tail or brake light that doesn't work, but you replaced the bulb and no change. You'll have to troubleshoot, so buy a simple volt/ohm meter.

Be sure the power is off and no power on any of the socket pins. Then clean the light socket and connection pins with a stiff brush or steel wool.

First, measure all the light socket pins for power. If you don't see any voltage, must be a fuse out or a broken wire or you aren't getting a good solid ground reference.
Turn power off and make sure the socket ground is really ground by using the ohmmeter between the socket ground and a known good ground. If the ohmmeter reading is 1 or 2 ohms the socket is probably good. If the ohmmeter measures higher, then the ground connection is bad or ground wire is broken. Try to trace the ground wire, run your own wire if you have to.
Once the the socket ground measures ok, then you have to determine which hot pin is bad.
There are two hot pins, one for each filament, tail and stop light.
Pick one and measure the voltage referenced to the, now good, socket ground.
You should have power now, so try a bulb in the socket.

This Tip still in work.

on Apr 23, 2015 | Cars & Trucks

1 Answer

Front parking lights stop working. Tested all fuses and other moduels etc in fuse areas under bonnet and inside car all tested okay. All other lights work and tail lights etc. I changed the parker light...

It could be a ground problem. See if you can trace the ground wire from the bulb socket. If you can identify which connector of the bulb socket is the ground, you can do a continuity test from the socket to the frame or body, using a multi meter. You can also use the multi meter to check for voltage at the socket; positive lead of meter to positive connector of socket and negative lead of meter (black) to a ground. If you get voltage ( about 12 V ) then the problem is a broken ground wire.

May 26, 2014 | 2003 Toyota Camry

6 Answers

Tail light not working brake works

There could be a wiring fault or a defective socket.

Nov 25, 2017 | Cars & Trucks

1 Answer

1997 Subaru Impreza Tail lights work but brake lights don't even though the Hatch brake light is working

So, both sides are not working? Check for voltage @ the brake light bulb to see if you're getting power. Also, look in the fuses.

check out the online Subaru forums, too.


Oct 03, 2012 | 1990 Subaru Legacy

1 Answer

Brake light bulb Issue

A bad socket is a common enough problem that it is likely that, rather than a wiring problem. Just splice in a new socket, if you can, or whatever is easier and cheaper (like a tail light assembly from a salvage yard).
Of course if you have a voltmeter or testlight, you can check at the socket electrical connector for power when it should be there-when the brake is pressed.

Apr 26, 2012 | Ford Mustang Cars & Trucks

1 Answer

2004 Jeep Grand Cherokee. Brake lights, turn signals, flashers all work correctly. However, no tail lights. Have replaced bulbs, but still no results. What could be the issue? No indication in owners...

if you have side marker lights then you have a short between them and the tail light sockets, its the same circuit , you need a meter to check this, remove one tail light bulb,, put the black lead to the base of the bulb holder, and the red lead to the little dab of solder inside the bulb socket, if your show 12v ,, then its the bulb , if not,, the socket isn't getting power and you need to back track the short or broken wire, ( make sure that the lights are on when doing this test ) normally the problem will be found where the wires in the harness come into the trunk area, or its just a bad ground,, so check that first

Aug 19, 2011 | 2004 Jeep Grand Cherokee

2 Answers

Im looking for the fuse for the right tail light

You do not have a separate fuse for each side, if the left side works, replace the bulb in the right side that isn't working.

Jun 26, 2011 | 2002 Jaguar X-Type

1 Answer

Tail lights don't work. Fuse is goo and bulbs are

check for voltage at the fuse and at the light bullb socket.

If you have juice at the fuse and none at the bulb look for a short.

You could have a broken ground wire too. So try grounding the bulb with a test light.

Good luck and be safe.

Dec 13, 2009 | 2000 Lexus RX 300

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