Topics

1

Maintenance / Left brake light/tail light issues

« on: July 20, 2020, 09:45:59 PM »

Need some help here. I have a 1969 standard Camaro with a left brake light/taillight illumination problem.
Scenario one:
  Left rear brake light when depressed is dim.  The bulb is good (checked for continuity). A visual inspection of the light reveals that the "brake" filament does not light up, but instead the taillight filament is lighting up. . Thus I have a dimly lit bulb.     Voltage at the socket to the unlit filament (with brake applied) is 10.85.  Voltage at the socket to the "lit" taillite filament is .36. (Again, why there is any voltage at all to taillight filament is not understood).     

  The right side  brake light lights up correctly (that is, brake light filament is what is energized).   Voltage to the right side socket is exactly the same as the voltage to the left side.

Scenario two:  Brake pedal depressed and headlights on
Now, when the headlamp switch is engaged with the brakes depressed, left brake/taillight goes completely off. Neither filament is illuminated        The right side taillight and brake light work fine and shows excellent lumination. Voltage to left socket is 10.12 (for taillight filament) and 10.28 for brake filament).    I have voltage but NO ILLUMINATION.   Right side socket voltage:  10.2 for light filament and 10.2 for brake filament .   GOOD ILLUMINATION

Scenario Three:    Headlights on - brake NOT depressed.   Both taillights are illuminated;   Voltage left side socket  10.12 for light filament and 1.26 for brake filament (why is there voltage to the brake filament???);  Right side 10.08 for light filament and again, 0.9 for brake filament.

The left side socket is fairly new.    Tested socket for continuity to ground.  Socket is good from what I can tell.

ANY THOUGHTS ON WHY MY LEFT SIDE SOCKET IS USING THE TAILLIGHT FILAMENT AND NOT BRAKE FILAMENT FOR ILLUMINATION WHEN THE BRAKES ARE DEPRESSED ?  2)ANY THOUGHTS ON WHY LEFT TAIL/LIGHT FILAMENT AND BRAKE FILAMENT DO NOT ENERGIZE WHEN HEADLIGHTS ARE TURNED ON WITH BRAKES DEPRESSED?
 
          NOTE:  TURN SIGNALS WORK BOTH SIDES in all three scenarios

Any thoughts and guidance is appreciated.

Ace

2

General Discussion / downpipe compatability with L48 stock exhaust manifold

« on: February 21, 2019, 07:38:54 PM »

Hello CRG members:

Planning to return my 69 coupe to a transverse exhaust system.  The engine -an L48 - has stock exhaust manifolds (part nos. 3932376 and 3942529).  Current downpipe/intermediate pipe measures 2".  I would like to purchase a 2.25" system that came with the 69 Z28's.  So here are my questions:
Will a 2.25 inch system designed for Z-28's mate up with the stock exhaust manifolds on a 350 c.i. engine?  The point of concern is that the heat-riser valve advertised for 69 exhaust manifolds seem to come only with a diameter of 2 inches.  Did the 302 c.i engine  use a larger diameter (2.25 inch) heat-riser valve than the 350 c.i. used?

Thanks for the input

Ace