Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Faulty brake light pressure switch

My brake lights stay on intermittently, I give the switch a gentle tap then light goes out.
Does anyone have a part # please?
I believe these switches aren’t very reliable, as an alternative has anyone tried mounting a micro switch off the brake pedal?

The alternative is a relay to keep the higher power off the switch. I think they area BL part.
Details here on the part number etc Brakes

I put a microswitch on my brake pedal in 2009 (I think) Dave and it's been totally reliable. I'll see if I can find the post.

Sadly that post was consumed by the debacle around Photobucket. But I mounted a relay on the crosshead, near the switch, which on my Roadster is offside chassis mounted.

The microswitch came from Maplins and I mounted that to a simple fabricated L bracket.

The mini-loom was piggy backed onto the existing switch terminals, so nothing was changed, allowing reversion to standard if necessary. The wires run through the bulkhead using the existing loom hole.

Don't bother sourcing a new hydraulic switch, because the quality is such that it will fail again at some point.

Retrieved image of piggy back on switch.....................



Retrieved image of relay mounting..................

Here is the part you requested Dave.
Slaving a relay will remove the current factor from the hydraulic switch as John suggests, this makes them far less prone to failure.

I have never had a failure on either of my Plus 8's in about 50,000mls and 11 years to put things in perspective for you.

Minés a similar age and mileage and I’m on my 4th switch, c’est la vie

Part of the problems seems to stem from the draw created by the additional brake light. I fitted a new switch and replaced the brake lights with LEDs. everything seems hunky dory now and for the past five or six years

Why not fit LED brake light bulbs, problem solved and no need for a relay.

David Byrne

Mine still failed even with leds. I did a flying change which worked

Part of the problem is the poor quality of OE replacements, that's why +8 Richard's originals are still working