No back up lights.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72gmcshorty · 07-04-2003, 03:26 AM

What cause no reverse lights to come on? My lights work when I press the brake pedal.

*Gee_Emm* · 07-04-2003, 09:01 AM

Sounds like grounding gremlins. Run a ground wire from a bare metal spot on the frame and touch it on the lense screw.

jay6891 · 07-04-2003, 09:28 AM

Might check wire and switch on top of column and see if you are getting power. Block your tires, turn on ignition,(not running),put into reverse and see if you got juice to lights.

71GMC_3/4T · 07-04-2003, 10:02 AM

Have someone stand behind the truck while you run the gear selector from park to neutral. If the lights blink on, the switch needs adjustment.
If you look at the switch, there will be four wires attached to it with two different plugs. The purple wires are for the neutral safety start. The other two wires are for the backup lights. Pull that connector off and short across the plug with a piece of wire with the key on. If the lights work, you have a bad or misadjusted switch.
Let us know what you find.

Longhorn Man · 07-04-2003, 12:23 PM

All 3 of mine had kerfaggled switches on the column.

71GMC_3/4T · 07-04-2003, 07:56 PM

Glad mine isn't kerfaggled! I imagine that's pretty bad, eh?
Mine is slightly defuggered. It just needs a little adjustment, for the last 3 years...

I didn't think they even worked until one night I was backing up and didn't quite get in reverse. I was looking around trying to figure out who turned on the porch light when I finally realized my reverse lights were actually on! Now, if they would work when the truck is actually in reverse... I know, adjus tit! Some day I will dern it!

Boardrider52 · 07-04-2003, 08:47 PM

i'v got that same problem

*Gee_Emm* · 07-04-2003, 11:17 PM

I got the same problem too, I just wiggle the shifter if I want the lights to come on.

**68Custom** · 07-05-2003, 04:27 AM

Anyone out there NOT have this problem? I know its got my lights as well, oh well :p

Aaron

PanelDeland · 07-05-2003, 11:19 AM

Since I have a panel there is no veiw out the sides and limited visibility out the back.I adjusted mine and while I was at it I added a back up alarm from a forklift.I feel safer backing up and it sure attracts attention.That makes it much more likely a small child won't wonder behind the truck while I'm backing up.Also makes it easier for other drivers to know they can have the spot I'm vacating if they will give me space to back out.

07-04-2003, 03:26 AM	#1
72gmcshorty Registered User Join Date: Jul 2001 Location: North Delta, British Columbia Posts: 1,344	No back up lights.... What cause no reverse lights to come on? My lights work when I press the brake pedal. __________________ 1992 Gmc 2wd 1972 Chevy Blazer 2wd

07-04-2003, 09:28 AM	#3
jay6891 Car Knocker Join Date: May 2001 Location: jefferson,arkansas Posts: 664	Might check wire and switch on top of column and see if you are getting power. Block your tires, turn on ignition,(not running),put into reverse and see if you got juice to lights. __________________ 68 c-10,91 sportside bed,350 .030 over,4 bolt,10-1 comp,2.05 intake/1.94 exhaust,1.6 Harland Sharp roller rockers,edelbrock rpm cam and intake w/750 carb, 700r4, 3.73 gears,Jacabbs Electronic Igntion w/Accel HEI distributer and super coil. ZR-1 roll pan, filled tailights. Blazer tank. Hidden hitch. 2 1/2" Flowmaster 40's. Parts bought but not installed>> ford 9" posi with disc. CCP front and rear lowering kit 4/5. Cab corners,foor boards,rockers, cab braces, Phatom grill, Painless wiring kit. Last edited by jay6891; 07-04-2003 at 09:30 AM.

07-04-2003, 10:02 AM	#4
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	Have someone stand behind the truck while you run the gear selector from park to neutral. If the lights blink on, the switch needs adjustment. If you look at the switch, there will be four wires attached to it with two different plugs. The purple wires are for the neutral safety start. The other two wires are for the backup lights. Pull that connector off and short across the plug with a piece of wire with the key on. If the lights work, you have a bad or misadjusted switch. Let us know what you find. __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO

07-04-2003, 07:56 PM	#6
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	Glad mine isn't kerfaggled! I imagine that's pretty bad, eh? Mine is slightly defuggered. It just needs a little adjustment, for the last 3 years... I didn't think they even worked until one night I was backing up and didn't quite get in reverse. I was looking around trying to figure out who turned on the porch light when I finally realized my reverse lights were actually on! Now, if they would work when the truck is actually in reverse... I know, adjus tit! Some day I will dern it! __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO

07-04-2003, 08:47 PM	#7
Boardrider52 Registered User Join Date: Feb 2003 Location: Phoenix, Arizona Posts: 212	i'v got that same problem __________________ 72' Jimmy member of Above~n~beyond truck club members.fortunecity.com/aboveandbeyondtrucks

07-04-2003, 09:01 AM	#2
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	Sounds like grounding gremlins. Run a ground wire from a bare metal spot on the frame and touch it on the lense screw.

07-04-2003, 12:23 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	All 3 of mine had kerfaggled switches on the column.

07-04-2003, 11:17 PM	#8
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	I got the same problem too, I just wiggle the shifter if I want the lights to come on.

07-05-2003, 04:27 AM	#9
68Custom Hammer On! Join Date: Jul 2001 Location: Olathe, KS Posts: 473	Anyone out there NOT have this problem? I know its got my lights as well, oh well :p Aaron __________________ 1968 C20 Inline 6 250 SM465 4 speed 1968 K10 Inline 6 250 SM465 4 speed

07-05-2003, 11:19 AM	#10
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,992	Since I have a panel there is no veiw out the sides and limited visibility out the back.I adjusted mine and while I was at it I added a back up alarm from a forklift.I feel safer backing up and it sure attracts attention.That makes it much more likely a small child won't wonder behind the truck while I'm backing up.Also makes it easier for other drivers to know they can have the spot I'm vacating if they will give me space to back out. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"



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