Diagnosing lamps is easy. Use a test light. Anywhere in the circuit
you either have power or you don't. Start at the brake switch. If
no power on the input side, check upstream (the fusebox
connections). If power in but no power on the output side with pedal
pressed, replace the switch (commonly bad), or it may only need
adjustment. If power out with pedal pressed, move on to the brake
lamps. If no power at the lamp input, look for a loose or corroded
connector in the harness between the switch and lamp. If power in at
the lamp but no light, it may be a burnt out bulb. Otherwise look
for loose bulb connections or bad ground connection.
Barney Gaylord
1958 MGA with an attitude
http://MGAguru.com
At 10:56 AM 9/5/2011 -0500, Steven Gorr wrote:
>Need some help finding where my brake lights have gone. I have, so far,
>cleaned the #3 fuse connections as that seems to feed the green circuit. I
>have cleaned the bullet connectors in the boot. Checked the bulbs. Removed and
>tested the switch on the back of the pedal box. I did get them to come back
>once, but subsequent pushes on the pedal failed. Ibm stumped as to what to
>try next. Any suggestions would be gratefully accepted.
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