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Old 12-02-2010, 07:29 AM
69coupe 69coupe is offline
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light increase

My brake and indicator lights are not the brightest on a sunny day. Without going to the cost of leds or new lenses, whats the best way to improve the globe output ? Will just changing the globes do the trick ?
I know the lights where not "brilliant" 40 years ago but I would feel safer with a bit more output. Front indicators are fine. The back loom is original

Any tips ?
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Old 12-02-2010, 12:32 PM
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Quote:
Originally Posted by 69coupe View Post
My brake and indicator lights are not the brightest on a sunny day. Without going to the cost of leds or new lenses, whats the best way to improve the globe output ? Will just changing the globes do the trick ?
I know the lights where not "brilliant" 40 years ago but I would feel safer with a bit more output. Front indicators are fine. The back loom is original

Any tips ?
Do you have a good circuit to earth (ground)?
How much voltage to the lights?
Are the lamps just dirty?
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Old 12-02-2010, 02:17 PM
69coupe 69coupe is offline
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Nev
Just checked the voltage at the rear and I only have 11.8 volts.
At the alternator its 13.8. The loom is all new at the front of the car and original at the back. Earths all seem good using a ohm meter.
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Old 12-02-2010, 02:21 PM
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If you get some mylar or something else thats reflective and fit it behind the globe it makes a huge difference. I did it to mine but then converted them to LED using 13 dollar trailer lights notched in to the housing just for something different.
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Old 12-02-2010, 02:39 PM
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I noticed a huge difference with new housings and lenses. I almost think mine is too bright, but better to be bright than have someone run up your bum because they didnt see you.
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Old 12-02-2010, 05:20 PM
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BlackoutSteve BlackoutSteve is offline
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Even though there are good ways to improve the reflectiveness of the lamp housings.. I'd be concerned with the 2 Volt drop to the rear of the car.

Car bodies can often have a lot of resistance from one end to the other that is often revealed (heard) when installing amps & stereos in the trunk..

Just out of interest, have you run a wire directly from the ground connection to the battery's ground terminal? See what the voltage is then and your globes are sure to glow brighter if it gains that missing 2 Volts!

While rewiring my Camaro, I'm running a hidden ground wire from front to rear (while grounding at points along the way) for this very reason, and so I don't get white noise from the voltage differential between my amp and head unit.
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Old 13-02-2010, 06:22 AM
69coupe 69coupe is offline
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[QUOTE=blackoutsteve;32848]Just out of interest, have you run a wire directly from the ground connection to the battery's ground terminal? See what the voltage is then and your globes are sure to glow brighter if it gains that missing 2 Volts!
QUOTE]

Will try it Steve, actually my battery is in the boot so easy to do
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Old 13-02-2010, 07:58 AM
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Just saw these "ultra bright" lamps, might be worth looking at if you can'tf ind any other problems

http://www.americanautowire.com/cata...ng&Sockets.pdf
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Old 13-02-2010, 08:33 AM
qik66 qik66 is offline
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The most likely source of the voltage drop is through the brake light switch on the pedal or if you are keen you could fit a relay in the boot to supply battery voltage direct to the brake lights.
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