I'm resurrecting my 1973 142. Haven't started it in a year. All went well except that the rear (only the rear) parking lights and brake lights stay on all the time. They get very marginally brighter when I actually switch them on if that means anything.

Any ideas?

Regards
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JohnH, Sydney, Australia

Thanks for the advice. It turned out to be a combination of a) the brake switch being just activated - I adjusted the brake rod and that fixed it, and b) a slightly dodgy earth at one of the rear lights. All good now.

Regards
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JohnH, Sydney, Australia

What happens when you step on the brakes?

I would make sure your rear light assemblies have good clean earths.
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69 142S Overdrive + 69 164S Manual

"the rear (only the rear) parking lights and brake lights stay on all the time."

Sounds like a short.

Try pulling fuses, one at a time until the lights go out. It would indicate which circuit is being shorted to, and providing the power.
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1980 245 Canadian B21A with SU carb, M46 trans, 3:31 dif, in Brampton, Ont.

Sounds like your brake light switch might be faulty.

Try removing one of the wires to the brake light switch under the dash.

One of the wires has power all the time, so make sure you don't blow the fuse.
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Eric

Hi Performance Automotive Service (formerly OVO or Old Volvos Only)

Torrance, CA 90502