Brake lights blow fuse - Impala Tech
Electrical & Wiring Troubleshooting electrical problems

 
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post #1 of 8 (permalink) Old 04-02-2010, 07:54 PM Thread Starter
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Brake lights blow fuse

On my 65 the rear outer and inner lights are the parking lights and brake lights , the center lights are the back up lights.


The brake lights are bright until you pull the socket out of the housing , then , without the additional ground the lights will dim some........plug the socket back into its housing and it gets bright again..........seem normal?

Anyway , if I have the parking lights on and THEN hold the brake pedal in for a little while , eventually it will blow the fuse and I lose the parking lights , brake and dash lights and dome lights since they appear to be on the same circuit. Seems like a lot of lamps on one circuit . No I havent calculated the amp draw yet but the harness appears to be in tact and actually the wiring seems to be in pretty good shape. Bad ground?

Any ideas?
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post #2 of 8 (permalink) Old 04-02-2010, 08:21 PM
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Is the metal part of what holds the fuse rusty/corroded?
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post #3 of 8 (permalink) Old 04-02-2010, 08:51 PM
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Bulb technology (and numbers for the lamps has changed with time. You will have to add up the wattage of all of the bulbs and see how close you are to the amperage of the fuse (divide total Watts by 12 Volts to get the Amp draw). To find the Watts you can find that information written on the bulbs card in an autoparts store if you can not find it on line. It left the factory with 1157 and 1156 bulbs in the back,what is there now I do not know.

Big Dave
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post #4 of 8 (permalink) Old 04-02-2010, 09:17 PM Thread Starter
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thanks


what I'll probably end up doing is pull power for the brake lights from another source , like the unused terminals on the box. Then use an inline fuse.
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post #5 of 8 (permalink) Old 04-02-2010, 09:30 PM Thread Starter
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Quote:
Originally Posted by dgwar View Post
Is the metal part of what holds the fuse rusty/corroded?

well they dont look new , but I cant see where thats the issue.......

BUT , worth looking at anyway
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post #6 of 8 (permalink) Old 04-02-2010, 11:09 PM
 
 
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I happened to experience the same problem with yours, I was almost in the middle of my trip when the fuse break out...due to some electrical malfunctions...sometimes we forgot to check the wirings..
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post #7 of 8 (permalink) Old 04-04-2010, 11:21 AM
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I'm having a similar problem where the dome lights on the back pillars of my '65 will blow the fuse if they are in place.

That fuse on the box reads 16A, is this right because the white writings are almost gone.

One part at a time.

'65 Super Sport 327.
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post #8 of 8 (permalink) Old 04-04-2010, 10:15 PM
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Quote:
Originally Posted by JOESPANOVA View Post
well they dont look new , but I cant see where thats the issue.......

BUT , worth looking at anyway
If they are coroded/rusty, the fuse will not make good connection, that will cause resistance(heat) and the fuse will blow.
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