Turn signal question

[crvc]

I have a '67 with two year old wiring. If a bulb burns out the dash flasher still works but at triple speed. It's doing that now but all the bulbs work. The right rear turn signal light is much dimmer than the left. I don't know anything about electricity. I do know most VW electrical problems have to do with grounding.

Any suggestions?

TIA

crvc

[carcrazed]

check first to see if your bulb is in properly. The next thing I would look at is a bad ground at the light. Unscrew your ground wire and clean it up.
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1965 Herbie Replica. 1776cc dual Kads.
1961 Beetle 33,000 Original Miles

"Just When you think you are getting ahead, you're always wrong."

[hitest]

If your taillights are still grounded through the housings (stock), then loosen the nuts (8mm I think), scrub the bolt-down areas with a brass brush- then retighten all 4. It will often restore matched brightness in the rears. The fronts can benefit the same way- but are less-so bombarded with road crud when driving.

A bad ground in one bulb makes the turn signal circuit "see" a decrease in resistance- thus the well-grounded bulb flashes double time because the flasher thinks the one good bulb is all alone in the circuit. You may also see a faint glow in the taillight bulbs due to the same phenomenon- the circuit seeks a ground via feedback through the rest of the taillight housing. You may have to pull the rear lenses and perform the same ground maintenance on the two anchor screws at the bottom of the reflectors- but they will come back.
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[Wayne S. Johnson]

You can test each lamp socket for ground resistance by removing the lamp and reinstall it with a small test wire between the lamp base and socket. With the lamp on, measure the voltage between the test wire and the chassis, it should be less than 0.1 Volts.
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[DrKeck]

I think your bulb is upside down, if one is brighter than just take of the tai light covers and see if they are in properly.
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1966 Beetle
1600cc 50bhp
Daily Driver

[crvc]

I smeared everything with dielectric paste. That didn't do anything. Now the right rear bulb doesn't work while the dash flasher stays on but without blinking. When I get the time I'll add a ground wire from the bulb casing to the underside of the fender.

Thanks for the help,

crvc