Question about 2001 Jaguar XJ8

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Right brake light out

I checked power going to the connector and to the bulb socket, fuse is good. orginally all three lights were out and (left, right and center rear window ) replaced the fuse for center brake light and the bulb for the left and now I just have the right.... When I switch the connector bases from left to right both brake lights will work but are dim I know I am getting added resistance from somewhere please help... this would be alot easier with a wire diagram

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  • cliff james
    cliff james May 11, 2010

    have you got a really good earth

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I had a similar problem. i thought i was buying the correct bulb at an auto store. Turned out, i needed to by the bulb directly from Jaguar as they are slightly different

Posted on Jan 15, 2009

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No power to left rear turn/ brake light


Check the display. Ask a helper to step on the brake pedal while you check the lights from the rear. If no lights appear, check the fuse that connects the brake lights. The owners manual will show the location of the fuse box and which fuse is for the brake lights. Pull out the fuse and look at the wire in the central window. If the wire is broken, replace the fuse. Make sure the new fuse is not blown, and carries the same amperage.
Take note of lights that are out, if any are working. The problem may be cured by replacing the bulb in a brake light that's out. A burned out bulb has a broken filament and a dark brown spot on one side. Check the owners manual for bulb type.
Check the circuit if replacement bulbs and fuses do not restore the lights. Find the wiring diagram in the vehicle assembly manual. The circuit for the brake lights runs from the battery to the fuse, to the pedal switch, to a connection plug, to the lights. The circuit has to be checked with a volt tester at all points.
Check the battery power and the light on your volt tester. Turn the ignition key far enough to activate the electrical systems. Turn on the lights to check for battery power. If the battery has power, ues it to check the volt tester. Put the black lead (the ground) from the volt tester on the negative battery terminal. Briefly touch the red tester light on the positive terminal. The light on the volt tester should flash brightly.
Test the wiring to the fuse. Clip the ground wire to solid metal near the fuse. Touch the light tip to both sides of the fuse. Both should light the tester. If neither side lights, the wire between the battery and fuse is bad. If only one side lights, the fuse is blown.
Test the switch and wiring. Touch the light tip of the tester to both terminals on the brake pedal switch without putting any pressure on the pedal. One should carry power and the other should not. When both show power, the switch is stuck and the brake lights are always on. If neither shows power, the wiring between the fuse and the switch is bad. Now check both switch terminals while the pedal is depressed. Both sides should light the tester. If not, the switch is bad.
Check the connection plug. Unplug the connection and refer to the vehicle manual to identify the brake light wire. Touch the tester light on the brake light wire at the inner socket on the battery side. If the tester lights, the power is flowing to this point. If not, the wire between the plug and the pedal switch is bad.
Check the socket. Plug in the connector plug and remove the bulb. Touch the contact inside the socket. If the tester lights, the socket is good. The socket and wire running to the plug should be replaced if the tester doesn't light.
Check the bulb with the ground wire. The bulb must be in its socket. The ground wire running to the socket should be black or brown. Stab the tester through the insulation. If the tester lights, the bulb is good. Replace the bulb if it doesn't light.
Check the ground wire. Remove some of the insulation around the ground wire. Twist one end of the extra wire around the exposed ground wire. Touch the other end to a solid piece of metal. If the brake light comes on, the ground wire is bad.
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Oct 13, 2014 | 2000 Ford Expedition

2 Answers

How to trouble shoot no brakelights?


Well first you go to the fuse box and find stop light see if it has blown if not go to the rear and remove the globe holder plug assy which has either double or single light bulb if double get test light and touch either wire and get someone to turn on the ign switch [on but not start] and also put foot on the brake pedal ,if the test light dont light test the other wire base ,if no light comes on then go to the stop light switch mostly on the brakeline connection box under the bonnet or it could have a brake switch in the cab above the brake pedal and that will have either a broken wire or switch unserviceable .

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1 Answer

Right front side turn signal does not work replaced all bulbs and checked fuses headlight flashers work when hazards are on front to back except driverside turn signal ,in dash right stays solid left


I don't believe it would be a bad ground for just one light. It could be a wire, a socket connector, or the bulb socket itself. See if the wire has power at the socket when signaling left, with key on. If there is power, probably a bad socket or connector. If no power, check for power coming from flasher-the wire going to front left, or driver's side. If you have power from the flasher, but nothing at the socket, the wire has probably broken.
Good luck.

Feb 06, 2013 | Cars & Trucks

1 Answer

No rear brake lights, but 3rd one works. Fuses good, relays good, pedal area good, bulbs new, and new circuit board. What now


Im not sure the make ,year or model of your car but , the next thing to check as you already checked the fuses and brake light switch would be to check the wires going into the socket, the sockets go bad often so using a test light the next thing is to check the power and ground right before the socket, check the wires at the end before they enter the socket, if you have power and ground then the sockets are bad. you also know that the brake lights and the third light use diffrent power sorces, so just because the third light works doesnt mean the fuse is good for the other brake lights,good day,

Mar 29, 2011 | Chevrolet Silverado 1500 Cars & Trucks

4 Answers

My taillights and brakelights dont work on a 1997 chevy blazer s 10. cant find all the fuses?


in most cases the stop + tail lights are on the fuse circut .
as for the location of the fuse box i don't know what or where the fuses
you found are some fuses are found under the hood on top of the left fender well but rarely any light fuses your best bet is the owners manual
if not check the drivers side kick panel if its behind there it will be marked if not the lower dash may have removeable panel about 4"wide
also marked or the firewall with a black plastic cover or under the dash
facing down with or without cover

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3 Answers

I just bought NEW bulb for brake light


There aren't separate fuses for the left and right brake lights. So if one side is working and the other isn't you can rule out a fuse. Was the bulb socket corroded at all? Check for power and grounds at the socket by back probing the wires (of course, while having the brakes applied). If you have a good power and ground at the wires, the problem lies in the socket assembly. Should be available from the dealer for about $30 or so. It's also not out of the question to have a bad bulb out of the box. It's rare but just to rule it out, try it in the socket that works.

Good luck.

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2 Answers

2005 Ford F 250 Trailer signal and Brake lights not working on the right side of the trailer. Left side works great. The Truck lights work great as well. I have switched the fuses for the right and left...


Check the light mounts on the trailer's right side. It sounds like the ground is not connected on that side or the light bulb socket is broken or loose. A bad groundis usually caused by either a broken wire or rust under where the light is mounted. If there is rust, clean with a wire wheel then remount the light and test.

If the bulb socket is cracked or loose to the touch, replace the light mount but clean the mounting area as above.

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Bad or borken wire harness in the steering coloum. check power to brake switch, should have power on one side, if not check the fuse if fuse is good and you have no power then your turn signal switch or harness is bad.

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1 Answer

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no disrespect but....
Check the book and make sure you are using the proper bulbs on all sides. (3957 looks just like 3956 but wont work right)

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