Back up light will not work on Burb - The 1947 - Present Chevrolet & GMC Truck Message Board Network

86swb · 09-08-2005, 02:25 PM

I know the bulbs are good and the same goes for the fuse. What else could cause the back up lights not to work. Where do I look for the problem? Thanks

farside847 · 09-08-2005, 02:38 PM

What kind of tranny do you have? A 3 on the tree has the backup switch on the column. That switch breaks easily.

86swb · 09-08-2005, 05:29 PM

It is an auto 350 trans.

**hilljob26** · 09-08-2005, 06:23 PM

chevk your neutral safety switch,thats where my backup lights connect to,it is either bad,or it needs moved side to side,its kinda touchy

**Shock_Me** · 09-09-2005, 11:00 AM

After you've checked the neutral safety switch on the steering column, try cleaning the fuse socket. Mine was working intermittently, and that was the problem.

86swb · 09-09-2005, 11:59 AM

Thanks guys, will check these out. Do not know how to check to see if the neutral safety switch is good or bad. How do you tell?

cdowns · 09-09-2005, 01:00 PM

first place i'd check would be the socket// with the key in the on position and the tranny in reverse you should have 12v to the center electrode of the socket if so then you either have a bad bulb ,dirtyy contacts or bad ground if no juice at the socket then check the switch, theres a thin dark green wire that with the key in the on position should be feeding 12v to the backup switch and when the tranny is in rev the 12v comes thru the light green wire to the backup lamps

**pjmoreland** · 09-09-2005, 01:48 PM

If it's just your neutral safety switch that is out of adjustment, your back up lights should come on somewhere in the shifting range. With the key in the "on" position, try shifting slowly through all gears and see if the back up lights come on somewhere other than in reverse. If your back up lights come on somewhere other than in reverse, I'd recommend making sure your shifter linkage is adjusted properly before adjusting the neutral safety switch. You'll know that your shifter linkage is adjusted correctly if you can shift between neutral and drive without pulling back on the shifter lever.

If your back up lights don't come on at all, I'd suspect the screws that hold the metal light housing to the body and provide the ground path.

86swb · 09-09-2005, 07:31 PM

Thanks guys. You have given me lots of things to check out. Will get out tomorrow and see what I can find out. Appreciate all the help. Just love this board.

4x4Poet · 09-09-2005, 11:47 PM

Another possiblity to check down the line:

The bulb sockets could have corrosion at the bulb contact points. Easy check with voltmeter. Easy clean up, but watch to not wear down the contact points. I've found contact points on the end of spliceable wires in auto parts stores.

09-08-2005, 02:25 PM	#1
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Back up light will not work on Burb I know the bulbs are good and the same goes for the fuse. What else could cause the back up lights not to work. Where do I look for the problem? Thanks __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

09-08-2005, 02:38 PM	#2
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	What kind of tranny do you have? A 3 on the tree has the backup switch on the column. That switch breaks easily. __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree

09-08-2005, 05:29 PM	#3
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	It is an auto 350 trans. __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

09-08-2005, 06:23 PM	#4
hilljob26 Registered User Join Date: Dec 2004 Location: Gypsum Kansas 67448 Posts: 1,681	chevk your neutral safety switch,thats where my backup lights connect to,it is either bad,or it needs moved side to side,its kinda touchy __________________ 21 2500hd duramax 58 apache HILLJOB GRAPHIX--for all your graphic needs My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=542497 LS ENGINE SWAP INFORMATION THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=377348 4l60 to an NP205 http://67-72chevytrucks.com/vboard/s...43#post3697343

09-09-2005, 11:59 AM	#6
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Thanks guys, will check these out. Do not know how to check to see if the neutral safety switch is good or bad. How do you tell? __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

09-09-2005, 11:00 AM	#5
Shock_Me Senior Member Join Date: May 2005 Location: New Brunswick, Canada Posts: 591	After you've checked the neutral safety switch on the steering column, try cleaning the fuse socket. Mine was working intermittently, and that was the problem.

09-09-2005, 01:00 PM	#7
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	first place i'd check would be the socket// with the key in the on position and the tranny in reverse you should have 12v to the center electrode of the socket if so then you either have a bad bulb ,dirtyy contacts or bad ground if no juice at the socket then check the switch, theres a thin dark green wire that with the key in the on position should be feeding 12v to the backup switch and when the tranny is in rev the 12v comes thru the light green wire to the backup lamps __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

09-09-2005, 01:48 PM	#8
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,981	If it's just your neutral safety switch that is out of adjustment, your back up lights should come on somewhere in the shifting range. With the key in the "on" position, try shifting slowly through all gears and see if the back up lights come on somewhere other than in reverse. If your back up lights come on somewhere other than in reverse, I'd recommend making sure your shifter linkage is adjusted properly before adjusting the neutral safety switch. You'll know that your shifter linkage is adjusted correctly if you can shift between neutral and drive without pulling back on the shifter lever. If your back up lights don't come on at all, I'd suspect the screws that hold the metal light housing to the body and provide the ground path.

09-09-2005, 07:31 PM	#9
86swb Born a Chevy Man Join Date: Apr 2005 Location: Navarre, Florida Posts: 10,221	Thanks guys. You have given me lots of things to check out. Will get out tomorrow and see what I can find out. Appreciate all the help. Just love this board. __________________ John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 1986 Chevy SWB Silverado 1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) CHEVY, American made w/pride! If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS

09-09-2005, 11:47 PM	#10
4x4Poet Registered User Join Date: Nov 2004 Location: "Under Montana skies." Posts: 1,836	Another possiblity to check down the line: The bulb sockets could have corrosion at the bulb contact points. Easy check with voltmeter. Easy clean up, but watch to not wear down the contact points. I've found contact points on the end of spliceable wires in auto parts stores. __________________ '71 GMC K20 Suburban, '71 GMC K10 Suburban, '72 Chevy C10 CST Suburban, '72 Chevy K20 clunker pickup.



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