Tim,
I'd use a meter to verify that the tail lights are really grounded. Turn
on the tail lights and check the voltage on the ground wire at the tail
lights. It should be well less than one volt. If that is OK, short out
the turn signal flasher so that it doesn't flash (short the 2 pins
together), turn on the turn signals for one side and check the voltage
at the bulbs. It should be close to battery voltage. Check the other side.
With the engine running the battery voltage should be about 13.6 volts.
With the engine off, it may be as low as 11 volts, but will probably be
around 12 volts.
Someone already mentioned the fuse box as a possibility. To check that,
connect a volt meter to the input of the brake light switch. Step on the
brakes and see what the voltage reads. It should be close to battery
voltage. If it is good, try the output of the switch. It should read the
same. Next check the voltage at the brake light bulbs. It should be close.
There are various connectors hidden in our cars that generally don't
give problems but can. It may me a connector problem, but not always.
I am not familiar with the high windshield cars, but do know electrics
quite well and can help you.
Whatever - if any- of these readings are out of whack, please let me
know and I can walk you through the next level of troubleshooting.
Peace,
Pat
Thusly spake Tim, On 8/22/2009 12:57 PM:
> I have tail lights and turn signal lights, but no brake lights. The turn
>signals are slow but do work.
>
> The rear harness is grounded to the frame and the plugs and wires all look
>good. I have tried two different brake pedal switches (one was new and both
>tested good) and neither has worked. All fuses are good. (but my horn no
>longer works as well)
>
> Help!!!
>
> Tim
> Belleville, WI.
> '70 SPL AND SRL
> Still clueless but always learning
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