Hi Stephane, If you have 12v to the bulb, and the bulb is good, then the
problem has got to be a bad ground! Bad grounds are 90% of the problems with
the lights it seems. To check, take a piece of wire and ground it to the body
or neg side of battery. place other end of wire on the socket housing of lamp in
question. If you then depress the brake pedal the lamp should light. Any time
that you have power at a light and the lamp doesn't light, check the ground.
Another easy test is using a standard old cheap 12v test light, put the
alligator clip to 12v pos. then put the probe end on the lamp housing. The light
should! if not, no ground!! Hope this helps! keep it between the lines dave
Stephane St-Amant wrote:
> Hello everyone,
>
> Now that I'm back from our honeymoon, I have finally some time to work on
> the Spit.
>
> Sunday, I decided to tackle the electrical system. More precisely, the
> lights all around the car.
> - Headlight? Check
> - High Beams? Check
> - Rear Parking Lights? Check
> - Blinkers? Nope, Flasher unit need to be replaced
> - Backup lights? Nope, both bulbs are blown, will replace
>
> Now, here's where I'm stumped (I check the archives but coudn't find
> anything similar)
> - Brake Light? Nope
> - Check the light bulds - Look OK
> - Clean the connections
> - Test - Works... Try again, don't work...Hummm
> - Get my trusty voltmeter (about 20 years old - never failed me.
> - Check the current at the socket - Pedal released: 0 volt, Pedal Pressed:
> 12 volt - Good
> - Put the light back in and test: Not working
> - Check for continuity in the bulb (with the voltmeter/tester): OK Double
> Hummmmm
> - Put the bulb in 180 degree turn and turn the parking lights on: the brake
> filament is on (Now I really know that the bulb is fine.
> - Put the bulb in the right way again: Parking light work, brakes light
> don't!!! DARN
> - Test the connection with the voltmeter WITH the light bulb in the socket
> and press the brake pedal: NOTHING! That's weird!
>
> (Let's double check this one!!!)
> - Pull the bulb out, press the brake pedal, check voltage: 12 volts
> - Put the bulb back in, press the brake pedal, check voltage: 0 volts
>
> Any idea???
>
> TIA
> Steph
> '69 Spit - Hers (With brake lights from the Outer Limits!!!)
> '71 TR6 - Mine (Awaiting patiently in pieces!)
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