signal lights issue...1996 - Page 2 - Chevy Impala SS Forum
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post #11 of 13 (permalink) Old 06-18-2019, 06:56 PM Thread Starter
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Just finished today...

Replaced signal switch, everything including the sequential set up works.

Thanks for the help guys
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post #12 of 13 (permalink) Old 06-19-2019, 06:46 AM
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Quote:
Originally Posted by Z09B4U View Post
....


This does sound like a turn signal switch or wiring problem. The brake signal goes through the switch. You could unplug the harness and use a test light to check all input circuits ie brake in, hazard in and turn in. Depending on the flashers a test light may not draw enough current to get them to flash the test light.


.....
Good call there, thanks. Lernt sumptin'

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post #13 of 13 (permalink) Old 06-19-2019, 07:23 PM
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Just to clear up why I think the sequential blinkers require one to upgrade the car with some bigger wire and some relays.
The 2057 is 2.1 amps so a stock car with four loads the turn switch with 8.4A. Add the extra two bulbs and now the switch passes 12.6A. 12.6A/8.4A is a 150% overload of the turn switch. Some OEM switches do not seem to be affected, but they are now well over 20 years old and it can not be good for the switch. The 150% overload is also running through the car's wiring and is causing issues. Old electrical connectors do not like extra loads. See pics of the trunk connector.


Consider the trunk ground with a stock car. 8.4A brakes, 4.2A backup, 2.46A taillights, and 4.5A for the fuel pump. The ground wire has to handle 19.56A. Add two more bulbs and it now handles 24.72Amps. 14 gauge wire is not good enough to ground this load. The left and right light wires are also undersized for extra loads.


This is why I recommend that the fuel pump ground should be separate from the rear bulbs. Even better separate the right side bulbs from the left.


Since I still tow with my car I ran a 10 gauge to the trunk and run separate fused circuits for my rear lights and the trailers.
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