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#1 |
Outlandish Trends - FL
Join Date: Jul 2005
Location: Orlando
Posts: 1,396
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still trouble w/ tail lights
well, I'm still puzzled why my tail lights are not functioning properly. The blinkers both work, but the tail lights and brake lights don't. I've checked the entire fuse panel with a test light and all are good. Replaced both relays. Checked both bulbs out back. I just don't get it. Any other ideas? It shouldn't be a ground if the blinkers are working right? Please help!! Otherwise I'm gonna take it in saturday morning to an auto electrical place and the guy told me it'll probably cost me $125.00!!!! I've gotta get it fixed before the Rod Run in daytona thanksgiving weekend. I'm running outta options.
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-Bret 67 short-fleet sold! |
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#2 |
fugedaboutit
![]() Join Date: Mar 2005
Location: Gresham, OR
Posts: 832
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Re: still trouble w/ tail lights
Rear harness in good shape?
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#3 |
fugedaboutit
![]() Join Date: Mar 2005
Location: Gresham, OR
Posts: 832
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Re: still trouble w/ tail lights
I'm just brain(mush)storming here..
Isnt there a brakelight switch? Is it stuck?
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#4 | |
Outlandish Trends - FL
Join Date: Jul 2005
Location: Orlando
Posts: 1,396
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Re: still trouble w/ tail lights
Quote:
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-Bret 67 short-fleet sold! |
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#5 |
fugedaboutit
![]() Join Date: Mar 2005
Location: Gresham, OR
Posts: 832
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Re: still trouble w/ tail lights
yeah your probably right.. sorry.
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#6 |
Senior Member
Join Date: Jan 2005
Location: Raleigh, NC
Posts: 894
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Re: still trouble w/ tail lights
The stop lamps and blinkers use the same wire from the dash harness and thus the same filament on the bulb. The tail lights use the second filament in the rear bulbs.
Knowing this, check your stop lamp circuit first to see that the switch works. Then check to see that you are getting running light power back to the tail lights. If your license plate light works when you put on the parking lights, you have power getting to the rear of the truck for the running lights, it's just not getting to the tail lights. Unplug and plug in the gauge circuit board connector, mine was not making good contact and causing a similar problem.
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-Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals... |
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#7 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: still trouble w/ tail lights
The brake lights will either be the brake light switch... or the turn signal switch. 99% likely to be one of the two.
The tail lights... pull a bulb and see if you are getting power.... heck, just replace a bulb with a new one to rule out the dummy mistake. (yes... I've spent hrs troubleshooting only to discover the bulbs were bad) If the bulbs are good, I say look under the bumer first, the harness was probably hacked up for a trailer plug. Look at the brown wire for bad connections or breaks in the wire. Do your dash lights work? how about the front parking lights? (which will only work in the parking light position, and turn off when the headlights come on) |
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#8 | |
Senior Member
Join Date: Jan 2005
Location: Raleigh, NC
Posts: 894
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Re: still trouble w/ tail lights
Quote:
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-Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals... |
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#9 |
Registered User
Join Date: May 2003
Location: Shreveport LA
Posts: 3,170
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Re: still trouble w/ tail lights
Tail-light fuse?
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#10 | |
Outlandish Trends - FL
Join Date: Jul 2005
Location: Orlando
Posts: 1,396
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Re: still trouble w/ tail lights
Quote:
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-Bret 67 short-fleet sold! |
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#11 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,527
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Re: still trouble w/ tail lights
Make sure you have 12 volts on the orange wire that runs from the fuse panel to the brake light switch. Then make sure you have 12 volts on the white wire that runs from the brake light switch to the steering column when you press the brake pedal. If both of these things look good, then I'm guessing you need a new turn signal switch in your steering column.
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#12 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: still trouble w/ tail lights
when i did mine my turn singals would work but the brake and tails nope turns out that i had to take an wire brush and clean the fenders where the bucket of the lights sit because they wheren't grounding right and now they work great
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#13 |
Registered User
Join Date: Dec 2004
Location: Stephenville, Texas
Posts: 420
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Re: still trouble w/ tail lights
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72 Super Cheyenne lwb 4X4 Ocra / White ![]() 88 Chevy 1 ton Dumptruck ![]() 88 Chevy 1ton Flat bed 4X4 white ![]() |
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#14 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: still trouble w/ tail lights
i also rewire from the plug back lol and had the trouble that was the last thing i tried cleand the grounds a boom everythign work
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#15 |
Registered User
Join Date: Oct 2005
Location: Metro Vancouver
Posts: 444
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Re: still trouble w/ tail lights
I had the same problem after replacing my bed mount bolts,
it ended up being a grounding problem (bed to frame). My turn signals worked but were not as bright as usual. |
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#16 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: still trouble w/ tail lights
A bad gouund makes no sence... but it won't hurt to look.
The not as bright signals with a bad ground is back feeding into the parking light circuit a coupl ehave said look at the fuse... in the original post, he stated that he checked every fuse and then replaced both relays..... I'll asume the relays in question are the flashers, which they were working fine already. |
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#17 | |
Outlandish Trends - FL
Join Date: Jul 2005
Location: Orlando
Posts: 1,396
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Re: still trouble w/ tail lights
Quote:
Truckdude, where exactly did you hit the fenders w/ the brush?
__________________
-Bret 67 short-fleet sold! |
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#18 |
Registered User
Join Date: Aug 2005
Location: Spring, Tx.
Posts: 31
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Re: still trouble w/ tail lights
I have a friend with 67 stepside. He kept blowing fuses. His brake lights and tail lights wouldn't work, the blinkers would. We ended up checking all of the harness from the fuse box to the lights. We found some small nicks the wire. I don't know if that helps. If thats not the problem, then take a wire and conect one end to the light (where it mounts) and the other end to the frame. This will eliminate a ground problem. Good luck
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#19 |
Senior Member
![]() Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,234
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Re: still trouble w/ tail lights
when you take the colored lences off then un screw the metal bucket where the metal bucket sits on the fenders in the hole shoot mine had primer shot in them
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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#20 |
Registered User
Join Date: Nov 2005
Location: Canada
Posts: 20
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Re: still trouble w/ tail lights
I had similiar problems with my lights and it always came back to a ground issue....
Kurtis
__________________
72 Chev Custom Fleetside 2wd, 350 mild performance rebuilt crete .20 over, flat top KB pistons, stock crank, 74cc heads, Edelbrock cam, HEI, 1987 rebuilt R4 700, 20" Eagle rims with cooper 275 45 20's, and a whole lot of body work left to do. My Grandpa bought the truck new and it has worked hard for 33 years. It will now be starting its new life as a street machine and show truck. |
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#21 |
Outlandish Trends - FL
Join Date: Jul 2005
Location: Orlando
Posts: 1,396
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Re: still trouble w/ tail lights
OK, pulled the steering wheel and took a look at the switch. Is there any way to tell it is bad? It was super easy to get to, and I had it partially out of the column but didn't want to completely disassemble it, nor did I know how so I put everything back together.
Note #2: When the headlights are on, and then I turn either right or left blinker on, the blinkers blink at half their normal speed than if the headlights are not on. Maybe this narrows down the possible answers? Note #3: Hazard lights do NOT work. After I put everything back together I pushed in the hazard switch and I heard the relay ping once but I couldn't get it to ping again no matter what I tried. Note #4: Dash lights still don't work, exdept the blinker indicator lights and the blue bright light signaling the bright headlights are on.
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-Bret 67 short-fleet sold! Last edited by 67Fleet; 11-17-2005 at 09:47 PM. |
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#22 |
Senior Member
Join Date: Jan 2005
Location: Raleigh, NC
Posts: 894
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Re: still trouble w/ tail lights
I'm also starting to suspect the problem is in the turn signal switch. The white wire can be accessed at the turn signal harness connector.
__________________
-Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals... |
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#23 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,527
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Re: still trouble w/ tail lights
The white wire for your brake lights runs from the connector on your brake switch (in the same connector as the orange (yellow) wire). It then runs through the harness to the "C" shaped connector that is dangling out of your steering column. The white wire is at one end of the column, right next to the light and dark green wires that come out of the column to feed your brake/turn signal lights. If you have power at the "C" shaped connector on that white wire when the brake pedal is pushed down, and your brake lights don't come on, I'm pretty sure your turn signal switch is worn out.
You might want to take a look at the brass contact plate inside the turn signal switch to see if all the little bumps are worn off of it. To gain access to the brass contact plate, you'll have to remove the screw that holds the turn signal lever in place, remove the two long thin leaf springs on the right that help center the switch when your turn signals are off. There are two annoying plastic latches that you have to flex out of the way. Then you should be able to pull the top half of the switch off. The brass contact plate will come off with it. I had a '69 that had all kinds of crazy problems with the lights because the brass contact plate was totally worn out and was shorting various circuits together inside the turn signal switch. #4: There's a black wire coming out of the connector that plugs into the back of the gauge panel. If I remember correctly, the black wire is the ground path for the gauge panel lights. It is supposed to be clipped to the metal part of the dash. You might want to check to make sure the wire is clipped on. If it is clipped on, try wiggling it around a bit to help it bite in, especially if the back of the dash has been painted. |
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#24 |
Outlandish Trends - FL
Join Date: Jul 2005
Location: Orlando
Posts: 1,396
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Re: still trouble w/ tail lights
OK,well I have a turn signal switch coming in to the local parts store this afternoon. I'll get going on putting it in tonight or tomorrow morning. If that's not the problem, I'm going to blow a fuse of my own. I HATE ELECTRICAL PROBLEMS!!!! Is there anything I should know about replacing the switch? Any pointers? Is it pretty much plug and play?
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-Bret 67 short-fleet sold! |
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#25 |
1968 C20 Vortec Beast
Join Date: Jun 2005
Location: STILLWATER,OKLAHOMA
Posts: 483
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Re: still trouble w/ tail lights
Hey! Check Out The Plug Above The Accelerator Where The Rear Lights Go Through The Firewall. I Am Wondering If That Didn't Get How And Expand A Little Bit, Causing A Short. Seems Like Everything For The Front Is Working Right. The Only Other Thing I Would Say Is To Make A Test Ground Frome The Body To The Frame.
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Ugly or not it still kicks a**! |
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