Question about 1994 GMC Sierra

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My tail lights are notworking properly? The front park lamps are working but rear ones are glowing slightly and when I put the brakes on every thing goes out and license plate bulb lights?

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It sounds like either a bad headlight switch, or a poor ground, check the body ground and make sure that the tail lights are getting a good ground. Most likely it is the headlight switch.

Posted on Apr 27, 2010

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1 Answer

No tail lights on a 99 jeep grand Cherokee


there are many running lamps. best name is park
some go front, some go tail, some go side, and some go
to dash. largest run of 1 circuit on car.... park.
then HL switch, 1 click, does dash glow.?
does all side lamps glow, and front and rear.?
check fuses first. as that is always first.
some jeeps have a relay called , PARK.
license plate rear lamp out too>????????????
fuse 6 in JB , junction fuse box is park
as is park relay
the BCM computer, sees you turn the park switch
the BCM the (the brain inside) energizes the PARK relay
and if the fuse is good , all parks glow.
including the lic, plate lamps.

what we do is check battery voltage first.
12.6vd is good, less is bad. i do this with parks on, and key on pocket as parks work all the time.
then check fuse 6
then last scan the PCM
if the PCM reports BCM errors, for park. we'd not IGNORE THAT.
did you?

Dec 21, 2015 | Jeep Cars & Trucks

1 Answer

My 2010 Subaru Outback tail lights are not working. What do I need to do?


This is odd.. I take it your front parking lights are working? The reason why I ask is that they are on the same circuit as the rear tail lamps usually. If both front and rears aren't working, check the fuse. If the fuse is good, replace the relay. If only the rears aren't working, check the ground wire for the rear wiring harness to the rear lights. This is still odd as your other lamps usually use the same ground point. Finally, if you aren't the first owner or you recently replaced the bulbs.. did you use the proper bulbs? Some bulbs have two filaments called 21/5 Watters. Some vehicles use special connectors for the bulbs that be inserted in either orientation, but will only work both filaments when inserted properly. Try reversing the lamps inside the connectors, one at a time please between tests.

Apr 10, 2015 | 2010 Subaru Outback

2 Answers

I have a 2003 suzuki xl7 what causes the tail lights not to work when ive checked the bulbs and fuses and they are good


it can only be 3 things, blown fuse, (test them not gander)
open circuit or short circuit.
are you saying park running lights are dead, aka, TAIL.
are the park lights working up front, ? and on dash?
1st click of head light switch is park. that is dead,at all lamp inside and outside of car?
02 xl7 (usa car answers, we do, here, as it is a USA forum)

this car has a BCM, body brain.
and it runs most things, we scan it first to see if IT has issues.
called DTCs.
when you select TAIL, at switch this is a digital input to BCM
true (0v = true) signal tells BCM you want tail/ parks on.

it (BCM) then closes relay 23 (seen below) park/tail relay
if the fuse is not blown, then this relay glows the dash
Illumination lights (park dim) are yours glowing now.
yes the all that is good fuse to dash.
now out side car, lots of tail/park lamps, which dont glow, just rear?





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Feb 02, 2015 | Suzuki Cars & Trucks

1 Answer

No tail lights


no (park -tail-running lights) is dash parking lamps glowing?
check the tail fuse yet?
94 accord
this circuit is huge, park/tail, up to 20 lamps. are all dead>?
front park, side park, tail park and dash lamps all out.
this i the red-blk feed. all comments , USA, as lighting varies by country. (laws)
license plate light dead too????????? that too is park
there is NO RELAY.
the fuse 32 feeds the HL (head light) switch and in PARK posistion
it feeds 12vdc raw power to all 38 lamps. (side corning lamps,etc)
the license plate lamp is key, there are 2 lamps.
and both probably are not out.
so if they are good lamps and both tail lamps are good and fuse
then they must glow, if one lamp shorts as 1156 or the like love to do
then it blows the fuse. as does the trailer jack (option) .

so fuse 32 park/tail blown
or HL park switch bad, if all 20 odd lamps dead. and fuse holds.
that simple, and this cars wiring is very simple and nice.

Feb 26, 2014 | 1994 Honda Accord

1 Answer

Drivers side light is out and its not the bulb


are you talking Parking lights. all lamps work? cept one?
there are park(tail-running) blinker, brake, and fog.
my guess is side lamp means the actual car side parking lamps/.
there are huge numbers of lamps for park inside and out.
like 20, the inside lamps are DIMMable.
if all 20 odd lamps glow and one dont, it can only be.:
1: bad lamp.
2: bad socket to lamp
3: wires cut to said socket.
i use a thing called a voltmeter to see what part is bad.
got one,? $10 at walfart?

Jan 30, 2014 | Jeep Patriot Cars & Trucks

1 Answer

2002 Jeep Libertys right side parking light and rear brake light won't go off.


kEy off?
wow both park and brake failures.
sounds like one is shorted to the other
and either park and brake are stuck.
ok take the the tests
key off, parks and headlights off,
look at all lamps on car inside and out, which are one.
is the dash lights glowing (called illumation lamps) on.
and side lights off, and front park lights off, ,yes, all off then park is off,
so of rear lights glow , is it just brakes, that means the brake lamp switch is stuck on.
elaborate please.

Dec 09, 2013 | 2002 Jeep Liberty

4 Answers

Rear brake light doesn't work when headlights on


If you take the tail light assembly off and take the bulb out, you'll see three metal contacts on the tail light assembly.  Pry them up slightly and slide a small, folded piece of aluminum foil underneath it.  
Replace the bulb and try to reproduce the problem.  I found this fix online and did it to both sides of my car.. no problems since

Sep 20, 2008 | 2000 Jeep Grand Cherokee

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