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#1 |
Registered User
Join Date: Jul 2005
Location: Indiana
Posts: 40
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Tail Light Diagnosis
I'm trying to figure out my taillight/brake light problem, assuming I can describe it correctly:
Tails on: both sides work Brakes on: Left side on, Right side off Right Turn and Brakes on: works correctly Left Turn and Brakes on: works correctly Seems that if a wire was crossed, everything would still function, just burn on the wrong filament. I've spent days trying to figure out why I had a brake light sometimes and other times I didn't, only to notice they worked with the left turn/brake light combo... Ideas?
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#2 |
Senior Member
![]() Join Date: May 2002
Location: Hammond, WI
Posts: 1,804
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Re: Tail Light Diagnosis
Are you sure your getting a proper ground? I think that the housing is grounded to the bed, which in turn is grounded to the frame. Also, just to make sure, the light isn't burnt out, right?
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Mike 2001 Dakota R/T - Silver CC - 1 of 1671 •360 w/46RE •392 limited slip 1972 Chevy Suburban - Turquoise/Black 1969 Chevy C/10 - Blue LWB •350 w/ 700R4 •3.73 posi •PS PB A/C - SOLD ![]() Using your turn signal is not "giving information to the enemy" 67-72 FAQ |
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#3 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Tail Light Diagnosis
Grounding issues can cause you headaches. I had the same type problems on my GMC. Seems like the sypmtoms would change everytime I'd try something different.
One thing I did to help is polish the contacts of all my rear bulbs. I used a pencil eraser and some real fine sand paper. Read my post on this problem. And what I did to resolve. http://67-72chevytrucks.com/vboard/s...ight=grounding |
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Tail Light Diagnosis
not a ground problem.
Try this, with someone watching the tail lights, hit the brake pedal, and hold it down, and lightly wiggle the turn signal lever. lightly forwatd and back, up and down, but not enough to turn on the flasher. If that right brake light lights up, it's time for a new turn signal. You know the bulb is good, the tiurn signal lights up. You know the wire is good from the turn signal, the turn signal lights up. you know the ground is good, the turn signal lights up you know the brake light switch is working, the left brake comes on. The turn signal switch is pretty much the only cause. |
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#5 |
Senior Member
![]() Join Date: Oct 2007
Location: Marietta, GA
Posts: 797
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Re: Tail Light Diagnosis
I had a similar problem and it was a bad ground...
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#6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Tail Light Diagnosis
you had a problem where the turn signal would light up, but no brake light, unless the OTHER turn signal was on, and then that brake light that was previously out... would work....
and it was a ground? |
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#7 | |
Registered User
Join Date: Jul 2005
Location: Indiana
Posts: 40
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Re: Tail Light Diagnosis
Quote:
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#8 |
www.infantimachine.com
Join Date: May 2007
Location: Delta,BC Canada
Posts: 311
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Re: Tail Light Diagnosis
I had the same problem.What Longhorn Man describes is exactly what my problem was.Sometimes brake light worked sometimes it did not.Wiggled turn signal lever and noticed lights would work.Turn signal contacts just needed a little bending in my case.
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#9 |
Registered User
Join Date: Jul 2005
Location: Indiana
Posts: 40
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Re: Tail Light Diagnosis
Definitely is the switch as I wiggled that and the light works. I switched the steering column a couple of weeks ago, possibly didn't get something back together quite right. Anyone have an exploded diagram/pic of how all of this goes together?
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Pardon my questions...I'm a noob on a mission. |
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