no right brake light
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When diagnosing any problem, it's always best to assume nothing. Make sure that the bulb is good, either by testing it with 12-volt test leads (well, one 12-volt lead and one ground lead), or by trying another new one. Touch the ground lead to the brass casing, and then put 12 volts to each of the two contacts. You can also give the bulbs the old Mark Eight Eyeball Test by holding them up to a good light and making sure the filaments are intact. Not 100% effective at proving the bulb is good, but an obviously broken filament is 100% proof that it's bad. [Just thought of this - please don't take it personally, but make sure you're using a 2-contact bulb and not a single-contact bulb].
Next, don't assume that the socket is making proper contact with the contacts on the bottom of the bulb. Spray some WD-40 in there and move the contact plate up and down against the spring it sits on; make sure it moves freely, and that the contacts aren't too corroded.
Next, don't assume that the contacts are each getting 12 volts. One contact should get juice when the taillights are on (and more juice when the brake pedal is depressed IIRC), and the other should get juice when the turn signal is on. Use a test light; the kind with the sharp point on it. Make sure the test light has a good ground, then touch the pointy end on each of the contacts.
If there's no juice at the contact for the brake light function, then you probably have a broken wire, bad ground, or bad connection that you need to track down.
There are other things you'd need to check if neither brake light was coming on, like the brake pedal switch, but I gathered from your post that only one side isn't working.
Good luck, and Happy New Year.
Next, don't assume that the socket is making proper contact with the contacts on the bottom of the bulb. Spray some WD-40 in there and move the contact plate up and down against the spring it sits on; make sure it moves freely, and that the contacts aren't too corroded.
Next, don't assume that the contacts are each getting 12 volts. One contact should get juice when the taillights are on (and more juice when the brake pedal is depressed IIRC), and the other should get juice when the turn signal is on. Use a test light; the kind with the sharp point on it. Make sure the test light has a good ground, then touch the pointy end on each of the contacts.
If there's no juice at the contact for the brake light function, then you probably have a broken wire, bad ground, or bad connection that you need to track down.
There are other things you'd need to check if neither brake light was coming on, like the brake pedal switch, but I gathered from your post that only one side isn't working.
Good luck, and Happy New Year.
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