I have a couple of questions concerning turn signal switches and brake lights. A little background. Most everyone knows that a problem with the turn signal switch can cause problems not only with the turn signals but also the brake lights. In my 65 FSM it shows there is a hot always wire to the (shown in the square) brake light switch. When the switch completes the electrical circuit, power goes from the brake switch to the turn signal switch via the white wire. The turn signal switch must internally activate the brake lights. When the turn signal is turned on for either a left or right turn, the switch receives power through the turn signal flasher (circled) and pink wire. If the brakes were on when the turn signal was turned on, the switch overrides the brake light and this is also done internally, which my 65 FSM doesn’t show. Neither do my 69 or 71 manuals show this.
I found in a J Body manual an actual turn signal wiring diagram
For 82 the brake light and turn signal body wiring is virtually the same as in my 65, 69 and 71 manuals in that the white wire from the brake switch goes to the turn signal switch as does the pink wire from the turn signal flasher. I’m not sure how it all happens inside the switch and if anyone wants to explain it, I’m always up to learning something new.
So the reason for all the above is I want to make some safety lighting upgrades to include amber turn signals separate from the customary brake/turn signal harness and add a 3rd brake light.
To accomplish these upgrades, I believe I can move the turn signal/brake light wires from their connectors to act as separate left and right turn signal wiring. A separate wire from the kick panel connector would be routed to the former brake/turn signal connecter and would function as the new brake system wiring. It would be connected to the same connector which still has the taillight wiring as original. The new brake wiring is also connected to my 3rd brake light.
So here’s the questions: i’m thinking I should be able to run my new brake wire to the brake switch and all 3 brake lights would function independently from the turn signals. I’m not sure I need to add a hot wire to the now disconnected turn signal white wire to make the turn signals function since they also get power through the turn signal flasher OR is my thinking wrong on this? Maybe the white wire provides power for the 4 way flashers and turn signals. Even it it needs separate power via the white wire it should have no effect on the brake lights. I’m not an electrical guru but can pretty much follow the schematics. What say the electrical gurus?
I found in a J Body manual an actual turn signal wiring diagram
For 82 the brake light and turn signal body wiring is virtually the same as in my 65, 69 and 71 manuals in that the white wire from the brake switch goes to the turn signal switch as does the pink wire from the turn signal flasher. I’m not sure how it all happens inside the switch and if anyone wants to explain it, I’m always up to learning something new.
So the reason for all the above is I want to make some safety lighting upgrades to include amber turn signals separate from the customary brake/turn signal harness and add a 3rd brake light.
To accomplish these upgrades, I believe I can move the turn signal/brake light wires from their connectors to act as separate left and right turn signal wiring. A separate wire from the kick panel connector would be routed to the former brake/turn signal connecter and would function as the new brake system wiring. It would be connected to the same connector which still has the taillight wiring as original. The new brake wiring is also connected to my 3rd brake light.
So here’s the questions: i’m thinking I should be able to run my new brake wire to the brake switch and all 3 brake lights would function independently from the turn signals. I’m not sure I need to add a hot wire to the now disconnected turn signal white wire to make the turn signals function since they also get power through the turn signal flasher OR is my thinking wrong on this? Maybe the white wire provides power for the 4 way flashers and turn signals. Even it it needs separate power via the white wire it should have no effect on the brake lights. I’m not an electrical guru but can pretty much follow the schematics. What say the electrical gurus?
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