As an FYI...
My restoration project car had an annoying habit of having the brake light warning led light up in the Check Panel (and the Flashing CHECK in the cluster) about a third of the time. I'd already replaced all the brake light bulbs with plated base Osrams, cleaned all of the bulb sockets, and the connectors. BTW: a brass bristle shotgun cleaning brush works like a champ. Get one that has little to no wire sticking out or trim it back to get deep into the sockets.
In retrospect it should have been obvious, but I didn't figure it out for a while. The cause was the brake light switch. While it was good enough to operate the brake lights it had just enough resistance to trigger the warning led some of the time. A simple check for this is to disconnect the switch, turn on the ignition, and use a wire to simulate the switch closing. If you do that multiple times with no warning led, replace the switch.
My restoration project car had an annoying habit of having the brake light warning led light up in the Check Panel (and the Flashing CHECK in the cluster) about a third of the time. I'd already replaced all the brake light bulbs with plated base Osrams, cleaned all of the bulb sockets, and the connectors. BTW: a brass bristle shotgun cleaning brush works like a champ. Get one that has little to no wire sticking out or trim it back to get deep into the sockets.
In retrospect it should have been obvious, but I didn't figure it out for a while. The cause was the brake light switch. While it was good enough to operate the brake lights it had just enough resistance to trigger the warning led some of the time. A simple check for this is to disconnect the switch, turn on the ignition, and use a wire to simulate the switch closing. If you do that multiple times with no warning led, replace the switch.
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